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"
16 #include "llvm/ADT/DenseMap.h"
17 #include "llvm/ADT/FoldingSet.h"
18 #include "llvm/ADT/StringExtras.h"
19 #include "llvm/ADT/UniqueVector.h"
20 #include "llvm/Module.h"
21 #include "llvm/DerivedTypes.h"
22 #include "llvm/CodeGen/AsmPrinter.h"
23 #include "llvm/CodeGen/MachineModuleInfo.h"
24 #include "llvm/CodeGen/MachineFrameInfo.h"
25 #include "llvm/CodeGen/MachineLocation.h"
26 #include "llvm/Analysis/DebugInfo.h"
27 #include "llvm/Support/Debug.h"
28 #include "llvm/Support/Dwarf.h"
29 #include "llvm/Support/CommandLine.h"
30 #include "llvm/Support/DataTypes.h"
31 #include "llvm/Support/Mangler.h"
32 #include "llvm/Support/raw_ostream.h"
33 #include "llvm/System/Path.h"
34 #include "llvm/Target/TargetAsmInfo.h"
35 #include "llvm/Target/TargetRegisterInfo.h"
36 #include "llvm/Target/TargetData.h"
37 #include "llvm/Target/TargetFrameInfo.h"
38 #include "llvm/Target/TargetInstrInfo.h"
39 #include "llvm/Target/TargetMachine.h"
40 #include "llvm/Target/TargetOptions.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; // 512
57 static const unsigned InitAbbreviationsSetSize = 9; // 512
58 static const unsigned InitValuesSetSize = 9; // 512
60 //===----------------------------------------------------------------------===//
61 /// Forward declarations.
66 //===----------------------------------------------------------------------===//
69 /// getGlobalVariablesUsing - Return all of the GlobalVariables which have the
70 /// specified value in their initializer somewhere.
72 getGlobalVariablesUsing(Value *V, std::vector<GlobalVariable*> &Result) {
73 // Scan though value users.
74 for (Value::use_iterator I = V->use_begin(), E = V->use_end(); I != E; ++I) {
75 if (GlobalVariable *GV = dyn_cast<GlobalVariable>(*I)) {
76 // If the user is a GlobalVariable then add to result.
78 } else if (Constant *C = dyn_cast<Constant>(*I)) {
79 // If the user is a constant variable then scan its users
80 getGlobalVariablesUsing(C, Result);
85 /// getGlobalVariablesUsing - Return all of the GlobalVariables that use the
86 /// named GlobalVariable.
88 getGlobalVariablesUsing(Module &M, const std::string &RootName,
89 std::vector<GlobalVariable*> &Result) {
90 std::vector<const Type*> FieldTypes;
91 FieldTypes.push_back(Type::Int32Ty);
92 FieldTypes.push_back(Type::Int32Ty);
94 // Get the GlobalVariable root.
95 GlobalVariable *UseRoot = M.getGlobalVariable(RootName,
96 StructType::get(FieldTypes));
98 // If present and linkonce then scan for users.
99 if (UseRoot && UseRoot->hasLinkOnceLinkage())
100 getGlobalVariablesUsing(UseRoot, Result);
103 //===----------------------------------------------------------------------===//
104 /// DWLabel - Labels are used to track locations in the assembler file.
105 /// Labels appear in the form @verbatim <prefix><Tag><Number> @endverbatim,
106 /// where the tag is a category of label (Ex. location) and number is a value
107 /// unique in that category.
110 /// Tag - Label category tag. Should always be a staticly declared C string.
114 /// Number - Value to make label unique.
118 DWLabel(const char *T, unsigned N) : Tag(T), Number(N) {}
120 void Profile(FoldingSetNodeID &ID) const {
121 ID.AddString(std::string(Tag));
122 ID.AddInteger(Number);
126 void print(std::ostream *O) const {
129 void print(std::ostream &O) const {
131 if (Number) O << Number;
136 //===----------------------------------------------------------------------===//
137 /// DIEAbbrevData - Dwarf abbreviation data, describes the one attribute of a
138 /// Dwarf abbreviation.
139 class DIEAbbrevData {
141 /// Attribute - Dwarf attribute code.
145 /// Form - Dwarf form code.
150 DIEAbbrevData(unsigned A, unsigned F)
156 unsigned getAttribute() const { return Attribute; }
157 unsigned getForm() const { return Form; }
159 /// Profile - Used to gather unique data for the abbreviation folding set.
161 void Profile(FoldingSetNodeID &ID)const {
162 ID.AddInteger(Attribute);
167 //===----------------------------------------------------------------------===//
168 /// DIEAbbrev - Dwarf abbreviation, describes the organization of a debug
169 /// information object.
170 class DIEAbbrev : public FoldingSetNode {
172 /// Tag - Dwarf tag code.
176 /// Unique number for node.
180 /// ChildrenFlag - Dwarf children flag.
182 unsigned ChildrenFlag;
184 /// Data - Raw data bytes for abbreviation.
186 SmallVector<DIEAbbrevData, 8> Data;
190 DIEAbbrev(unsigned T, unsigned C)
198 unsigned getTag() const { return Tag; }
199 unsigned getNumber() const { return Number; }
200 unsigned getChildrenFlag() const { return ChildrenFlag; }
201 const SmallVector<DIEAbbrevData, 8> &getData() const { return Data; }
202 void setTag(unsigned T) { Tag = T; }
203 void setChildrenFlag(unsigned CF) { ChildrenFlag = CF; }
204 void setNumber(unsigned N) { Number = N; }
206 /// AddAttribute - Adds another set of attribute information to the
208 void AddAttribute(unsigned Attribute, unsigned Form) {
209 Data.push_back(DIEAbbrevData(Attribute, Form));
212 /// AddFirstAttribute - Adds a set of attribute information to the front
213 /// of the abbreviation.
214 void AddFirstAttribute(unsigned Attribute, unsigned Form) {
215 Data.insert(Data.begin(), DIEAbbrevData(Attribute, Form));
218 /// Profile - Used to gather unique data for the abbreviation folding set.
220 void Profile(FoldingSetNodeID &ID) {
222 ID.AddInteger(ChildrenFlag);
224 // For each attribute description.
225 for (unsigned i = 0, N = Data.size(); i < N; ++i)
229 /// Emit - Print the abbreviation using the specified Dwarf writer.
231 void Emit(const DwarfDebug &DD) const;
234 void print(std::ostream *O) {
237 void print(std::ostream &O);
242 //===----------------------------------------------------------------------===//
243 /// DIE - A structured debug information entry. Has an abbreviation which
244 /// describes it's organization.
245 class DIE : public FoldingSetNode {
247 /// Abbrev - Buffer for constructing abbreviation.
251 /// Offset - Offset in debug info section.
255 /// Size - Size of instance + children.
261 std::vector<DIE *> Children;
263 /// Attributes values.
265 SmallVector<DIEValue*, 32> Values;
268 explicit DIE(unsigned Tag)
269 : Abbrev(Tag, DW_CHILDREN_no)
278 DIEAbbrev &getAbbrev() { return Abbrev; }
279 unsigned getAbbrevNumber() const {
280 return Abbrev.getNumber();
282 unsigned getTag() const { return Abbrev.getTag(); }
283 unsigned getOffset() const { return Offset; }
284 unsigned getSize() const { return Size; }
285 const std::vector<DIE *> &getChildren() const { return Children; }
286 SmallVector<DIEValue*, 32> &getValues() { return Values; }
287 void setTag(unsigned Tag) { Abbrev.setTag(Tag); }
288 void setOffset(unsigned O) { Offset = O; }
289 void setSize(unsigned S) { Size = S; }
291 /// AddValue - Add a value and attributes to a DIE.
293 void AddValue(unsigned Attribute, unsigned Form, DIEValue *Value) {
294 Abbrev.AddAttribute(Attribute, Form);
295 Values.push_back(Value);
298 /// SiblingOffset - Return the offset of the debug information entry's
300 unsigned SiblingOffset() const { return Offset + Size; }
302 /// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
304 void AddSiblingOffset();
306 /// AddChild - Add a child to the DIE.
308 void AddChild(DIE *Child) {
309 Abbrev.setChildrenFlag(DW_CHILDREN_yes);
310 Children.push_back(Child);
313 /// Detach - Detaches objects connected to it after copying.
319 /// Profile - Used to gather unique data for the value folding set.
321 void Profile(FoldingSetNodeID &ID) ;
324 void print(std::ostream *O, unsigned IncIndent = 0) {
325 if (O) print(*O, IncIndent);
327 void print(std::ostream &O, unsigned IncIndent = 0);
332 //===----------------------------------------------------------------------===//
333 /// DIEValue - A debug information entry value.
335 class DIEValue : public FoldingSetNode {
348 /// Type - Type of data stored in the value.
352 explicit DIEValue(unsigned T)
355 virtual ~DIEValue() {}
358 unsigned getType() const { return Type; }
360 // Implement isa/cast/dyncast.
361 static bool classof(const DIEValue *) { return true; }
363 /// EmitValue - Emit value via the Dwarf writer.
365 virtual void EmitValue(DwarfDebug &DD, unsigned Form) = 0;
367 /// SizeOf - Return the size of a value in bytes.
369 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const = 0;
371 /// Profile - Used to gather unique data for the value folding set.
373 virtual void Profile(FoldingSetNodeID &ID) = 0;
376 void print(std::ostream *O) {
379 virtual void print(std::ostream &O) = 0;
384 //===----------------------------------------------------------------------===//
385 /// DWInteger - An integer value DIE.
387 class DIEInteger : public DIEValue {
392 explicit DIEInteger(uint64_t I) : DIEValue(isInteger), Integer(I) {}
394 // Implement isa/cast/dyncast.
395 static bool classof(const DIEInteger *) { return true; }
396 static bool classof(const DIEValue *I) { return I->Type == isInteger; }
398 /// BestForm - Choose the best form for integer.
400 static unsigned BestForm(bool IsSigned, uint64_t Integer) {
402 if ((char)Integer == (signed)Integer) return DW_FORM_data1;
403 if ((short)Integer == (signed)Integer) return DW_FORM_data2;
404 if ((int)Integer == (signed)Integer) return DW_FORM_data4;
406 if ((unsigned char)Integer == Integer) return DW_FORM_data1;
407 if ((unsigned short)Integer == Integer) return DW_FORM_data2;
408 if ((unsigned int)Integer == Integer) return DW_FORM_data4;
410 return DW_FORM_data8;
413 /// EmitValue - Emit integer of appropriate size.
415 virtual void EmitValue(DwarfDebug &DD, unsigned Form);
417 /// SizeOf - Determine size of integer value in bytes.
419 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
421 /// Profile - Used to gather unique data for the value folding set.
423 static void Profile(FoldingSetNodeID &ID, unsigned Integer) {
424 ID.AddInteger(isInteger);
425 ID.AddInteger(Integer);
427 virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Integer); }
430 virtual void print(std::ostream &O) {
431 O << "Int: " << (int64_t)Integer
432 << " 0x" << std::hex << Integer << std::dec;
437 //===----------------------------------------------------------------------===//
438 /// DIEString - A string value DIE.
440 class DIEString : public DIEValue {
442 const std::string String;
444 explicit DIEString(const std::string &S) : DIEValue(isString), String(S) {}
446 // Implement isa/cast/dyncast.
447 static bool classof(const DIEString *) { return true; }
448 static bool classof(const DIEValue *S) { return S->Type == isString; }
450 /// EmitValue - Emit string value.
452 virtual void EmitValue(DwarfDebug &DD, unsigned Form);
454 /// SizeOf - Determine size of string value in bytes.
456 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const {
457 return String.size() + sizeof(char); // sizeof('\0');
460 /// Profile - Used to gather unique data for the value folding set.
462 static void Profile(FoldingSetNodeID &ID, const std::string &String) {
463 ID.AddInteger(isString);
464 ID.AddString(String);
466 virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, String); }
469 virtual void print(std::ostream &O) {
470 O << "Str: \"" << String << "\"";
475 //===----------------------------------------------------------------------===//
476 /// DIEDwarfLabel - A Dwarf internal label expression DIE.
478 class DIEDwarfLabel : public DIEValue {
483 explicit DIEDwarfLabel(const DWLabel &L) : DIEValue(isLabel), Label(L) {}
485 // Implement isa/cast/dyncast.
486 static bool classof(const DIEDwarfLabel *) { return true; }
487 static bool classof(const DIEValue *L) { return L->Type == isLabel; }
489 /// EmitValue - Emit label value.
491 virtual void EmitValue(DwarfDebug &DD, unsigned Form);
493 /// SizeOf - Determine size of label value in bytes.
495 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
497 /// Profile - Used to gather unique data for the value folding set.
499 static void Profile(FoldingSetNodeID &ID, const DWLabel &Label) {
500 ID.AddInteger(isLabel);
503 virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label); }
506 virtual void print(std::ostream &O) {
514 //===----------------------------------------------------------------------===//
515 /// DIEObjectLabel - A label to an object in code or data.
517 class DIEObjectLabel : public DIEValue {
519 const std::string Label;
521 explicit DIEObjectLabel(const std::string &L)
522 : DIEValue(isAsIsLabel), Label(L) {}
524 // Implement isa/cast/dyncast.
525 static bool classof(const DIEObjectLabel *) { return true; }
526 static bool classof(const DIEValue *L) { return L->Type == isAsIsLabel; }
528 /// EmitValue - Emit label value.
530 virtual void EmitValue(DwarfDebug &DD, unsigned Form);
532 /// SizeOf - Determine size of label value in bytes.
534 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
536 /// Profile - Used to gather unique data for the value folding set.
538 static void Profile(FoldingSetNodeID &ID, const std::string &Label) {
539 ID.AddInteger(isAsIsLabel);
542 virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label); }
545 virtual void print(std::ostream &O) {
546 O << "Obj: " << Label;
551 //===----------------------------------------------------------------------===//
552 /// DIESectionOffset - A section offset DIE.
554 class DIESectionOffset : public DIEValue {
557 const DWLabel Section;
561 DIESectionOffset(const DWLabel &Lab, const DWLabel &Sec,
562 bool isEH = false, bool useSet = true)
563 : DIEValue(isSectionOffset), Label(Lab), Section(Sec),
564 IsEH(isEH), UseSet(useSet) {}
566 // Implement isa/cast/dyncast.
567 static bool classof(const DIESectionOffset *) { return true; }
568 static bool classof(const DIEValue *D) { return D->Type == isSectionOffset; }
570 /// EmitValue - Emit section offset.
572 virtual void EmitValue(DwarfDebug &DD, unsigned Form);
574 /// SizeOf - Determine size of section offset value in bytes.
576 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
578 /// Profile - Used to gather unique data for the value folding set.
580 static void Profile(FoldingSetNodeID &ID, const DWLabel &Label,
581 const DWLabel &Section) {
582 ID.AddInteger(isSectionOffset);
585 // IsEH and UseSet are specific to the Label/Section that we will emit
586 // the offset for; so Label/Section are enough for uniqueness.
588 virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label, Section); }
591 virtual void print(std::ostream &O) {
596 O << "-" << IsEH << "-" << UseSet;
601 //===----------------------------------------------------------------------===//
602 /// DIEDelta - A simple label difference DIE.
604 class DIEDelta : public DIEValue {
606 const DWLabel LabelHi;
607 const DWLabel LabelLo;
609 DIEDelta(const DWLabel &Hi, const DWLabel &Lo)
610 : DIEValue(isDelta), LabelHi(Hi), LabelLo(Lo) {}
612 // Implement isa/cast/dyncast.
613 static bool classof(const DIEDelta *) { return true; }
614 static bool classof(const DIEValue *D) { return D->Type == isDelta; }
616 /// EmitValue - Emit delta value.
618 virtual void EmitValue(DwarfDebug &DD, unsigned Form);
620 /// SizeOf - Determine size of delta value in bytes.
622 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
624 /// Profile - Used to gather unique data for the value folding set.
626 static void Profile(FoldingSetNodeID &ID, const DWLabel &LabelHi,
627 const DWLabel &LabelLo) {
628 ID.AddInteger(isDelta);
632 virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, LabelHi, LabelLo); }
635 virtual void print(std::ostream &O) {
644 //===----------------------------------------------------------------------===//
645 /// DIEntry - A pointer to another debug information entry. An instance of this
646 /// class can also be used as a proxy for a debug information entry not yet
647 /// defined (ie. types.)
648 class DIEntry : public DIEValue {
652 explicit DIEntry(DIE *E) : DIEValue(isEntry), Entry(E) {}
654 // Implement isa/cast/dyncast.
655 static bool classof(const DIEntry *) { return true; }
656 static bool classof(const DIEValue *E) { return E->Type == isEntry; }
658 /// EmitValue - Emit debug information entry offset.
660 virtual void EmitValue(DwarfDebug &DD, unsigned Form);
662 /// SizeOf - Determine size of debug information entry in bytes.
664 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const {
665 return sizeof(int32_t);
668 /// Profile - Used to gather unique data for the value folding set.
670 static void Profile(FoldingSetNodeID &ID, DIE *Entry) {
671 ID.AddInteger(isEntry);
672 ID.AddPointer(Entry);
674 virtual void Profile(FoldingSetNodeID &ID) {
675 ID.AddInteger(isEntry);
678 ID.AddPointer(Entry);
685 virtual void print(std::ostream &O) {
686 O << "Die: 0x" << std::hex << (intptr_t)Entry << std::dec;
691 //===----------------------------------------------------------------------===//
692 /// DIEBlock - A block of values. Primarily used for location expressions.
694 class DIEBlock : public DIEValue, public DIE {
696 unsigned Size; // Size in bytes excluding size header.
706 // Implement isa/cast/dyncast.
707 static bool classof(const DIEBlock *) { return true; }
708 static bool classof(const DIEValue *E) { return E->Type == isBlock; }
710 /// ComputeSize - calculate the size of the block.
712 unsigned ComputeSize(DwarfDebug &DD);
714 /// BestForm - Choose the best form for data.
716 unsigned BestForm() const {
717 if ((unsigned char)Size == Size) return DW_FORM_block1;
718 if ((unsigned short)Size == Size) return DW_FORM_block2;
719 if ((unsigned int)Size == Size) return DW_FORM_block4;
720 return DW_FORM_block;
723 /// EmitValue - Emit block data.
725 virtual void EmitValue(DwarfDebug &DD, unsigned Form);
727 /// SizeOf - Determine size of block data in bytes.
729 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
732 /// Profile - Used to gather unique data for the value folding set.
734 virtual void Profile(FoldingSetNodeID &ID) {
735 ID.AddInteger(isBlock);
740 virtual void print(std::ostream &O) {
747 //===----------------------------------------------------------------------===//
748 /// CompileUnit - This dwarf writer support class manages information associate
749 /// with a source file.
752 /// ID - File identifier for source.
756 /// Die - Compile unit debug information entry.
760 /// GVToDieMap - Tracks the mapping of unit level debug informaton
761 /// variables to debug information entries.
762 DenseMap<GlobalVariable *, DIE *> GVToDieMap;
764 /// GVToDIEntryMap - Tracks the mapping of unit level debug informaton
765 /// descriptors to debug information entries using a DIEntry proxy.
766 DenseMap<GlobalVariable *, DIEntry *> GVToDIEntryMap;
768 /// Globals - A map of globally visible named entities for this unit.
770 std::map<std::string, DIE *> Globals;
772 /// DiesSet - Used to uniquely define dies within the compile unit.
774 FoldingSet<DIE> DiesSet;
776 /// Dies - List of all dies in the compile unit.
778 std::vector<DIE *> Dies;
781 CompileUnit(unsigned I, DIE *D)
782 : ID(I), Die(D), GVToDieMap(),
783 GVToDIEntryMap(), Globals(), DiesSet(InitDiesSetSize), Dies()
789 for (unsigned i = 0, N = Dies.size(); i < N; ++i)
794 unsigned getID() const { return ID; }
795 DIE* getDie() const { return Die; }
796 std::map<std::string, DIE *> &getGlobals() { return Globals; }
798 /// hasContent - Return true if this compile unit has something to write out.
800 bool hasContent() const {
801 return !Die->getChildren().empty();
804 /// AddGlobal - Add a new global entity to the compile unit.
806 void AddGlobal(const std::string &Name, DIE *Die) {
810 /// getDieMapSlotFor - Returns the debug information entry map slot for the
811 /// specified debug variable.
812 DIE *&getDieMapSlotFor(GlobalVariable *GV) {
813 return GVToDieMap[GV];
816 /// getDIEntrySlotFor - Returns the debug information entry proxy slot for the
817 /// specified debug variable.
818 DIEntry *&getDIEntrySlotFor(GlobalVariable *GV) {
819 return GVToDIEntryMap[GV];
822 /// AddDie - Adds or interns the DIE to the compile unit.
824 DIE *AddDie(DIE &Buffer) {
828 DIE *Die = DiesSet.FindNodeOrInsertPos(ID, Where);
831 Die = new DIE(Buffer);
832 DiesSet.InsertNode(Die, Where);
833 this->Die->AddChild(Die);
841 //===----------------------------------------------------------------------===//
842 /// Dwarf - Emits general Dwarf directives.
848 //===--------------------------------------------------------------------===//
849 // Core attributes used by the Dwarf writer.
853 /// O - Stream to .s file.
857 /// Asm - Target of Dwarf emission.
861 /// TAI - Target asm information.
862 const TargetAsmInfo *TAI;
864 /// TD - Target data.
865 const TargetData *TD;
867 /// RI - Register Information.
868 const TargetRegisterInfo *RI;
870 /// M - Current module.
874 /// MF - Current machine function.
878 /// MMI - Collected machine module information.
880 MachineModuleInfo *MMI;
882 /// SubprogramCount - The running count of functions being compiled.
884 unsigned SubprogramCount;
886 /// Flavor - A unique string indicating what dwarf producer this is, used to
888 const char * const Flavor;
891 Dwarf(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T,
896 , TD(Asm->TM.getTargetData())
897 , RI(Asm->TM.getRegisterInfo())
909 //===--------------------------------------------------------------------===//
912 AsmPrinter *getAsm() const { return Asm; }
913 MachineModuleInfo *getMMI() const { return MMI; }
914 const TargetAsmInfo *getTargetAsmInfo() const { return TAI; }
915 const TargetData *getTargetData() const { return TD; }
917 void PrintRelDirective(bool Force32Bit = false, bool isInSection = false)
919 if (isInSection && TAI->getDwarfSectionOffsetDirective())
920 O << TAI->getDwarfSectionOffsetDirective();
921 else if (Force32Bit || TD->getPointerSize() == sizeof(int32_t))
922 O << TAI->getData32bitsDirective();
924 O << TAI->getData64bitsDirective();
927 /// PrintLabelName - Print label name in form used by Dwarf writer.
929 void PrintLabelName(DWLabel Label) const {
930 PrintLabelName(Label.Tag, Label.Number);
932 void PrintLabelName(const char *Tag, unsigned Number) const {
933 O << TAI->getPrivateGlobalPrefix() << Tag;
934 if (Number) O << Number;
937 void PrintLabelName(const char *Tag, unsigned Number,
938 const char *Suffix) const {
939 O << TAI->getPrivateGlobalPrefix() << Tag;
940 if (Number) O << Number;
944 /// EmitLabel - Emit location label for internal use by Dwarf.
946 void EmitLabel(DWLabel Label) const {
947 EmitLabel(Label.Tag, Label.Number);
949 void EmitLabel(const char *Tag, unsigned Number) const {
950 PrintLabelName(Tag, Number);
954 /// EmitReference - Emit a reference to a label.
956 void EmitReference(DWLabel Label, bool IsPCRelative = false,
957 bool Force32Bit = false) const {
958 EmitReference(Label.Tag, Label.Number, IsPCRelative, Force32Bit);
960 void EmitReference(const char *Tag, unsigned Number,
961 bool IsPCRelative = false, bool Force32Bit = false) const {
962 PrintRelDirective(Force32Bit);
963 PrintLabelName(Tag, Number);
965 if (IsPCRelative) O << "-" << TAI->getPCSymbol();
967 void EmitReference(const std::string &Name, bool IsPCRelative = false,
968 bool Force32Bit = false) const {
969 PrintRelDirective(Force32Bit);
973 if (IsPCRelative) O << "-" << TAI->getPCSymbol();
976 /// EmitDifference - Emit the difference between two labels. Some
977 /// assemblers do not behave with absolute expressions with data directives,
978 /// so there is an option (needsSet) to use an intermediary set expression.
979 void EmitDifference(DWLabel LabelHi, DWLabel LabelLo,
980 bool IsSmall = false) {
981 EmitDifference(LabelHi.Tag, LabelHi.Number,
982 LabelLo.Tag, LabelLo.Number,
985 void EmitDifference(const char *TagHi, unsigned NumberHi,
986 const char *TagLo, unsigned NumberLo,
987 bool IsSmall = false) {
988 if (TAI->needsSet()) {
990 PrintLabelName("set", SetCounter, Flavor);
992 PrintLabelName(TagHi, NumberHi);
994 PrintLabelName(TagLo, NumberLo);
997 PrintRelDirective(IsSmall);
998 PrintLabelName("set", SetCounter, Flavor);
1001 PrintRelDirective(IsSmall);
1003 PrintLabelName(TagHi, NumberHi);
1005 PrintLabelName(TagLo, NumberLo);
1009 void EmitSectionOffset(const char* Label, const char* Section,
1010 unsigned LabelNumber, unsigned SectionNumber,
1011 bool IsSmall = false, bool isEH = false,
1012 bool useSet = true) {
1013 bool printAbsolute = false;
1015 printAbsolute = TAI->isAbsoluteEHSectionOffsets();
1017 printAbsolute = TAI->isAbsoluteDebugSectionOffsets();
1019 if (TAI->needsSet() && useSet) {
1021 PrintLabelName("set", SetCounter, Flavor);
1023 PrintLabelName(Label, LabelNumber);
1025 if (!printAbsolute) {
1027 PrintLabelName(Section, SectionNumber);
1031 PrintRelDirective(IsSmall);
1033 PrintLabelName("set", SetCounter, Flavor);
1036 PrintRelDirective(IsSmall, true);
1038 PrintLabelName(Label, LabelNumber);
1040 if (!printAbsolute) {
1042 PrintLabelName(Section, SectionNumber);
1047 /// EmitFrameMoves - Emit frame instructions to describe the layout of the
1049 void EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
1050 const std::vector<MachineMove> &Moves, bool isEH) {
1052 Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
1053 TargetFrameInfo::StackGrowsUp ?
1054 TD->getPointerSize() : -TD->getPointerSize();
1055 bool IsLocal = BaseLabel && strcmp(BaseLabel, "label") == 0;
1057 for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
1058 const MachineMove &Move = Moves[i];
1059 unsigned LabelID = Move.getLabelID();
1062 LabelID = MMI->MappedLabel(LabelID);
1064 // Throw out move if the label is invalid.
1065 if (!LabelID) continue;
1068 const MachineLocation &Dst = Move.getDestination();
1069 const MachineLocation &Src = Move.getSource();
1071 // Advance row if new location.
1072 if (BaseLabel && LabelID && (BaseLabelID != LabelID || !IsLocal)) {
1073 Asm->EmitInt8(DW_CFA_advance_loc4);
1074 Asm->EOL("DW_CFA_advance_loc4");
1075 EmitDifference("label", LabelID, BaseLabel, BaseLabelID, true);
1078 BaseLabelID = LabelID;
1079 BaseLabel = "label";
1083 // If advancing cfa.
1084 if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
1086 if (Src.getReg() == MachineLocation::VirtualFP) {
1087 Asm->EmitInt8(DW_CFA_def_cfa_offset);
1088 Asm->EOL("DW_CFA_def_cfa_offset");
1090 Asm->EmitInt8(DW_CFA_def_cfa);
1091 Asm->EOL("DW_CFA_def_cfa");
1092 Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Src.getReg(), isEH));
1093 Asm->EOL("Register");
1096 int Offset = -Src.getOffset();
1098 Asm->EmitULEB128Bytes(Offset);
1101 assert(0 && "Machine move no supported yet.");
1103 } else if (Src.isReg() &&
1104 Src.getReg() == MachineLocation::VirtualFP) {
1106 Asm->EmitInt8(DW_CFA_def_cfa_register);
1107 Asm->EOL("DW_CFA_def_cfa_register");
1108 Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Dst.getReg(), isEH));
1109 Asm->EOL("Register");
1111 assert(0 && "Machine move no supported yet.");
1114 unsigned Reg = RI->getDwarfRegNum(Src.getReg(), isEH);
1115 int Offset = Dst.getOffset() / stackGrowth;
1118 Asm->EmitInt8(DW_CFA_offset_extended_sf);
1119 Asm->EOL("DW_CFA_offset_extended_sf");
1120 Asm->EmitULEB128Bytes(Reg);
1122 Asm->EmitSLEB128Bytes(Offset);
1124 } else if (Reg < 64) {
1125 Asm->EmitInt8(DW_CFA_offset + Reg);
1127 Asm->EOL("DW_CFA_offset + Reg (" + utostr(Reg) + ")");
1130 Asm->EmitULEB128Bytes(Offset);
1133 Asm->EmitInt8(DW_CFA_offset_extended);
1134 Asm->EOL("DW_CFA_offset_extended");
1135 Asm->EmitULEB128Bytes(Reg);
1137 Asm->EmitULEB128Bytes(Offset);
1146 //===----------------------------------------------------------------------===//
1147 /// SrcLineInfo - This class is used to record source line correspondence.
1150 unsigned Line; // Source line number.
1151 unsigned Column; // Source column.
1152 unsigned SourceID; // Source ID number.
1153 unsigned LabelID; // Label in code ID number.
1155 SrcLineInfo(unsigned L, unsigned C, unsigned S, unsigned I)
1156 : Line(L), Column(C), SourceID(S), LabelID(I) {}
1159 unsigned getLine() const { return Line; }
1160 unsigned getColumn() const { return Column; }
1161 unsigned getSourceID() const { return SourceID; }
1162 unsigned getLabelID() const { return LabelID; }
1166 //===----------------------------------------------------------------------===//
1167 /// SrcFileInfo - This class is used to track source information.
1170 unsigned DirectoryID; // Directory ID number.
1171 std::string Name; // File name (not including directory.)
1173 SrcFileInfo(unsigned D, const std::string &N) : DirectoryID(D), Name(N) {}
1176 unsigned getDirectoryID() const { return DirectoryID; }
1177 const std::string &getName() const { return Name; }
1179 /// operator== - Used by UniqueVector to locate entry.
1181 bool operator==(const SrcFileInfo &SI) const {
1182 return getDirectoryID() == SI.getDirectoryID() && getName() == SI.getName();
1185 /// operator< - Used by UniqueVector to locate entry.
1187 bool operator<(const SrcFileInfo &SI) const {
1188 return getDirectoryID() < SI.getDirectoryID() ||
1189 (getDirectoryID() == SI.getDirectoryID() && getName() < SI.getName());
1193 //===----------------------------------------------------------------------===//
1194 /// DbgVariable - This class is used to track local variable information.
1198 DIVariable *Var; // Variable Descriptor.
1199 unsigned FrameIndex; // Variable frame index.
1202 DbgVariable(DIVariable *V, unsigned I) : Var(V), FrameIndex(I) {}
1205 DIVariable *getVariable() const { return Var; }
1206 unsigned getFrameIndex() const { return FrameIndex; }
1209 //===----------------------------------------------------------------------===//
1210 /// DbgScope - This class is used to track scope information.
1214 DbgScope *Parent; // Parent to this scope.
1215 DIDescriptor Desc; // Debug info descriptor for scope.
1216 // Either subprogram or block.
1217 unsigned StartLabelID; // Label ID of the beginning of scope.
1218 unsigned EndLabelID; // Label ID of the end of scope.
1219 SmallVector<DbgScope *, 4> Scopes; // Scopes defined in scope.
1220 SmallVector<DbgVariable *, 8> Variables;// Variables declared in scope.
1223 DbgScope(DbgScope *P, DIDescriptor D)
1224 : Parent(P), Desc(D), StartLabelID(0), EndLabelID(0), Scopes(), Variables()
1227 for (unsigned i = 0, N = Scopes.size(); i < N; ++i) delete Scopes[i];
1228 for (unsigned j = 0, M = Variables.size(); j < M; ++j) delete Variables[j];
1232 DbgScope *getParent() const { return Parent; }
1233 DIDescriptor getDesc() const { return Desc; }
1234 unsigned getStartLabelID() const { return StartLabelID; }
1235 unsigned getEndLabelID() const { return EndLabelID; }
1236 SmallVector<DbgScope *, 4> &getScopes() { return Scopes; }
1237 SmallVector<DbgVariable *, 8> &getVariables() { return Variables; }
1238 void setStartLabelID(unsigned S) { StartLabelID = S; }
1239 void setEndLabelID(unsigned E) { EndLabelID = E; }
1241 /// AddScope - Add a scope to the scope.
1243 void AddScope(DbgScope *S) { Scopes.push_back(S); }
1245 /// AddVariable - Add a variable to the scope.
1247 void AddVariable(DbgVariable *V) { Variables.push_back(V); }
1250 //===----------------------------------------------------------------------===//
1251 /// DwarfDebug - Emits Dwarf debug directives.
1253 class DwarfDebug : public Dwarf {
1256 //===--------------------------------------------------------------------===//
1257 // Attributes used to construct specific Dwarf sections.
1260 /// CompileUnits - All the compile units involved in this build. The index
1261 /// of each entry in this vector corresponds to the sources in MMI.
1262 std::vector<CompileUnit *> CompileUnits;
1263 DenseMap<Value *, CompileUnit *> DW_CUs;
1265 /// AbbreviationsSet - Used to uniquely define abbreviations.
1267 FoldingSet<DIEAbbrev> AbbreviationsSet;
1269 /// Abbreviations - A list of all the unique abbreviations in use.
1271 std::vector<DIEAbbrev *> Abbreviations;
1273 /// ValuesSet - Used to uniquely define values.
1275 // Directories - Uniquing vector for directories.
1276 UniqueVector<std::string> Directories;
1278 // SourceFiles - Uniquing vector for source files.
1279 UniqueVector<SrcFileInfo> SrcFiles;
1281 // Lines - List of of source line correspondence.
1282 std::vector<SrcLineInfo> Lines;
1284 FoldingSet<DIEValue> ValuesSet;
1286 /// Values - A list of all the unique values in use.
1288 std::vector<DIEValue *> Values;
1290 /// StringPool - A UniqueVector of strings used by indirect references.
1292 UniqueVector<std::string> StringPool;
1294 /// SectionMap - Provides a unique id per text section.
1296 UniqueVector<const Section*> SectionMap;
1298 /// SectionSourceLines - Tracks line numbers per text section.
1300 std::vector<std::vector<SrcLineInfo> > SectionSourceLines;
1302 /// didInitial - Flag to indicate if initial emission has been done.
1306 /// shouldEmit - Flag to indicate if debug information should be emitted.
1310 // RootDbgScope - Top level scope for the current function.
1312 DbgScope *RootDbgScope;
1314 // DbgScopeMap - Tracks the scopes in the current function.
1315 DenseMap<GlobalVariable *, DbgScope *> DbgScopeMap;
1317 struct FunctionDebugFrameInfo {
1319 std::vector<MachineMove> Moves;
1321 FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M):
1322 Number(Num), Moves(M) { }
1325 std::vector<FunctionDebugFrameInfo> DebugFrames;
1329 /// ShouldEmitDwarf - Returns true if Dwarf declarations should be made.
1331 bool ShouldEmitDwarf() const { return shouldEmit; }
1333 /// AssignAbbrevNumber - Define a unique number for the abbreviation.
1335 void AssignAbbrevNumber(DIEAbbrev &Abbrev) {
1336 // Profile the node so that we can make it unique.
1337 FoldingSetNodeID ID;
1340 // Check the set for priors.
1341 DIEAbbrev *InSet = AbbreviationsSet.GetOrInsertNode(&Abbrev);
1343 // If it's newly added.
1344 if (InSet == &Abbrev) {
1345 // Add to abbreviation list.
1346 Abbreviations.push_back(&Abbrev);
1347 // Assign the vector position + 1 as its number.
1348 Abbrev.setNumber(Abbreviations.size());
1350 // Assign existing abbreviation number.
1351 Abbrev.setNumber(InSet->getNumber());
1355 /// NewString - Add a string to the constant pool and returns a label.
1357 DWLabel NewString(const std::string &String) {
1358 unsigned StringID = StringPool.insert(String);
1359 return DWLabel("string", StringID);
1362 /// NewDIEntry - Creates a new DIEntry to be a proxy for a debug information
1364 DIEntry *NewDIEntry(DIE *Entry = NULL) {
1368 FoldingSetNodeID ID;
1369 DIEntry::Profile(ID, Entry);
1371 Value = static_cast<DIEntry *>(ValuesSet.FindNodeOrInsertPos(ID, Where));
1373 if (Value) return Value;
1375 Value = new DIEntry(Entry);
1376 ValuesSet.InsertNode(Value, Where);
1378 Value = new DIEntry(Entry);
1381 Values.push_back(Value);
1385 /// SetDIEntry - Set a DIEntry once the debug information entry is defined.
1387 void SetDIEntry(DIEntry *Value, DIE *Entry) {
1388 Value->Entry = Entry;
1389 // Add to values set if not already there. If it is, we merely have a
1390 // duplicate in the values list (no harm.)
1391 ValuesSet.GetOrInsertNode(Value);
1394 /// AddUInt - Add an unsigned integer attribute data and value.
1396 void AddUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer) {
1397 if (!Form) Form = DIEInteger::BestForm(false, Integer);
1399 FoldingSetNodeID ID;
1400 DIEInteger::Profile(ID, Integer);
1402 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1404 Value = new DIEInteger(Integer);
1405 ValuesSet.InsertNode(Value, Where);
1406 Values.push_back(Value);
1409 Die->AddValue(Attribute, Form, Value);
1412 /// AddSInt - Add an signed integer attribute data and value.
1414 void AddSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer) {
1415 if (!Form) Form = DIEInteger::BestForm(true, Integer);
1417 FoldingSetNodeID ID;
1418 DIEInteger::Profile(ID, (uint64_t)Integer);
1420 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1422 Value = new DIEInteger(Integer);
1423 ValuesSet.InsertNode(Value, Where);
1424 Values.push_back(Value);
1427 Die->AddValue(Attribute, Form, Value);
1430 /// AddString - Add a std::string attribute data and value.
1432 void AddString(DIE *Die, unsigned Attribute, unsigned Form,
1433 const std::string &String) {
1434 FoldingSetNodeID ID;
1435 DIEString::Profile(ID, String);
1437 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1439 Value = new DIEString(String);
1440 ValuesSet.InsertNode(Value, Where);
1441 Values.push_back(Value);
1444 Die->AddValue(Attribute, Form, Value);
1447 /// AddLabel - Add a Dwarf label attribute data and value.
1449 void AddLabel(DIE *Die, unsigned Attribute, unsigned Form,
1450 const DWLabel &Label) {
1451 FoldingSetNodeID ID;
1452 DIEDwarfLabel::Profile(ID, Label);
1454 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1456 Value = new DIEDwarfLabel(Label);
1457 ValuesSet.InsertNode(Value, Where);
1458 Values.push_back(Value);
1461 Die->AddValue(Attribute, Form, Value);
1464 /// AddObjectLabel - Add an non-Dwarf label attribute data and value.
1466 void AddObjectLabel(DIE *Die, unsigned Attribute, unsigned Form,
1467 const std::string &Label) {
1468 FoldingSetNodeID ID;
1469 DIEObjectLabel::Profile(ID, Label);
1471 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1473 Value = new DIEObjectLabel(Label);
1474 ValuesSet.InsertNode(Value, Where);
1475 Values.push_back(Value);
1478 Die->AddValue(Attribute, Form, Value);
1481 /// AddSectionOffset - Add a section offset label attribute data and value.
1483 void AddSectionOffset(DIE *Die, unsigned Attribute, unsigned Form,
1484 const DWLabel &Label, const DWLabel &Section,
1485 bool isEH = false, bool useSet = true) {
1486 FoldingSetNodeID ID;
1487 DIESectionOffset::Profile(ID, Label, Section);
1489 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1491 Value = new DIESectionOffset(Label, Section, isEH, useSet);
1492 ValuesSet.InsertNode(Value, Where);
1493 Values.push_back(Value);
1496 Die->AddValue(Attribute, Form, Value);
1499 /// AddDelta - Add a label delta attribute data and value.
1501 void AddDelta(DIE *Die, unsigned Attribute, unsigned Form,
1502 const DWLabel &Hi, const DWLabel &Lo) {
1503 FoldingSetNodeID ID;
1504 DIEDelta::Profile(ID, Hi, Lo);
1506 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1508 Value = new DIEDelta(Hi, Lo);
1509 ValuesSet.InsertNode(Value, Where);
1510 Values.push_back(Value);
1513 Die->AddValue(Attribute, Form, Value);
1516 /// AddDIEntry - Add a DIE attribute data and value.
1518 void AddDIEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry) {
1519 Die->AddValue(Attribute, Form, NewDIEntry(Entry));
1522 /// AddBlock - Add block data.
1524 void AddBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block) {
1525 Block->ComputeSize(*this);
1526 FoldingSetNodeID ID;
1529 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1532 ValuesSet.InsertNode(Value, Where);
1533 Values.push_back(Value);
1535 // Already exists, reuse the previous one.
1537 Block = cast<DIEBlock>(Value);
1540 Die->AddValue(Attribute, Block->BestForm(), Value);
1545 /// AddSourceLine - Add location information to specified debug information
1547 void AddSourceLine(DIE *Die, DIVariable *V) {
1548 unsigned FileID = 0;
1549 unsigned Line = V->getLineNumber();
1550 if (V->getVersion() < DIDescriptor::Version7) {
1551 // Version6 or earlier. Use compile unit info to get file id.
1552 CompileUnit *Unit = FindCompileUnit(V->getCompileUnit());
1553 FileID = Unit->getID();
1555 // Version7 or newer, use filename and directory info from DIVariable
1557 unsigned DID = Directories.idFor(V->getDirectory());
1558 FileID = SrcFiles.idFor(SrcFileInfo(DID, V->getFilename()));
1560 AddUInt(Die, DW_AT_decl_file, 0, FileID);
1561 AddUInt(Die, DW_AT_decl_line, 0, Line);
1564 /// AddSourceLine - Add location information to specified debug information
1566 void AddSourceLine(DIE *Die, DIGlobal *G) {
1567 unsigned FileID = 0;
1568 unsigned Line = G->getLineNumber();
1569 if (G->getVersion() < DIDescriptor::Version7) {
1570 // Version6 or earlier. Use compile unit info to get file id.
1571 CompileUnit *Unit = FindCompileUnit(G->getCompileUnit());
1572 FileID = Unit->getID();
1574 // Version7 or newer, use filename and directory info from DIGlobal
1576 unsigned DID = Directories.idFor(G->getDirectory());
1577 FileID = SrcFiles.idFor(SrcFileInfo(DID, G->getFilename()));
1579 AddUInt(Die, DW_AT_decl_file, 0, FileID);
1580 AddUInt(Die, DW_AT_decl_line, 0, Line);
1583 void AddSourceLine(DIE *Die, DIType *G) {
1584 unsigned FileID = 0;
1585 unsigned Line = G->getLineNumber();
1586 if (G->getVersion() < DIDescriptor::Version7) {
1587 // Version6 or earlier. Use compile unit info to get file id.
1588 CompileUnit *Unit = FindCompileUnit(G->getCompileUnit());
1589 FileID = Unit->getID();
1591 // Version7 or newer, use filename and directory info from DIGlobal
1593 unsigned DID = Directories.idFor(G->getDirectory());
1594 FileID = SrcFiles.idFor(SrcFileInfo(DID, G->getFilename()));
1596 AddUInt(Die, DW_AT_decl_file, 0, FileID);
1597 AddUInt(Die, DW_AT_decl_line, 0, Line);
1600 /// AddAddress - Add an address attribute to a die based on the location
1602 void AddAddress(DIE *Die, unsigned Attribute,
1603 const MachineLocation &Location) {
1604 unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
1605 DIEBlock *Block = new DIEBlock();
1607 if (Location.isReg()) {
1609 AddUInt(Block, 0, DW_FORM_data1, DW_OP_reg0 + Reg);
1611 AddUInt(Block, 0, DW_FORM_data1, DW_OP_regx);
1612 AddUInt(Block, 0, DW_FORM_udata, Reg);
1616 AddUInt(Block, 0, DW_FORM_data1, DW_OP_breg0 + Reg);
1618 AddUInt(Block, 0, DW_FORM_data1, DW_OP_bregx);
1619 AddUInt(Block, 0, DW_FORM_udata, Reg);
1621 AddUInt(Block, 0, DW_FORM_sdata, Location.getOffset());
1624 AddBlock(Die, Attribute, 0, Block);
1627 /// AddBasicType - Add a new basic type attribute to the specified entity.
1629 void AddBasicType(DIE *Entity, CompileUnit *Unit,
1630 const std::string &Name,
1631 unsigned Encoding, unsigned Size) {
1633 DIE Buffer(DW_TAG_base_type);
1634 AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
1635 AddUInt(&Buffer, DW_AT_encoding, DW_FORM_data1, Encoding);
1636 if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
1637 DIE *BasicTypeDie = Unit->AddDie(Buffer);
1638 AddDIEntry(Entity, DW_AT_type, DW_FORM_ref4, BasicTypeDie);
1641 /// AddPointerType - Add a new pointer type attribute to the specified entity.
1643 void AddPointerType(DIE *Entity, CompileUnit *Unit, const std::string &Name) {
1644 DIE Buffer(DW_TAG_pointer_type);
1645 AddUInt(&Buffer, DW_AT_byte_size, 0, TD->getPointerSize());
1646 if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
1647 DIE *PointerTypeDie = Unit->AddDie(Buffer);
1648 AddDIEntry(Entity, DW_AT_type, DW_FORM_ref4, PointerTypeDie);
1651 /// AddType - Add a new type attribute to the specified entity.
1652 void AddType(CompileUnit *DW_Unit, DIE *Entity, DIType Ty) {
1654 AddBasicType(Entity, DW_Unit, "", DW_ATE_signed, sizeof(int32_t));
1658 // Check for pre-existence.
1659 DIEntry *&Slot = DW_Unit->getDIEntrySlotFor(Ty.getGV());
1660 // If it exists then use the existing value.
1662 Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot);
1667 Slot = NewDIEntry();
1670 DIE Buffer(DW_TAG_base_type);
1671 if (Ty.isBasicType(Ty.getTag()))
1672 ConstructTypeDIE(DW_Unit, Buffer, DIBasicType(Ty.getGV()));
1673 else if (Ty.isDerivedType(Ty.getTag()))
1674 ConstructTypeDIE(DW_Unit, Buffer, DIDerivedType(Ty.getGV()));
1676 assert (Ty.isCompositeType(Ty.getTag()) && "Unknown kind of DIType");
1677 ConstructTypeDIE(DW_Unit, Buffer, DICompositeType(Ty.getGV()));
1680 // Add debug information entry to entity and unit.
1681 DIE *Die = DW_Unit->AddDie(Buffer);
1682 SetDIEntry(Slot, Die);
1683 Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot);
1686 /// ConstructTypeDIE - Construct basic type die from DIBasicType.
1687 void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
1690 // Get core information.
1691 const std::string &Name = BTy.getName();
1692 Buffer.setTag(DW_TAG_base_type);
1693 AddUInt(&Buffer, DW_AT_encoding, DW_FORM_data1, BTy.getEncoding());
1694 // Add name if not anonymous or intermediate type.
1696 AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
1697 uint64_t Size = BTy.getSizeInBits() >> 3;
1698 AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
1701 /// ConstructTypeDIE - Construct derived type die from DIDerivedType.
1702 void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
1703 DIDerivedType DTy) {
1705 // Get core information.
1706 const std::string &Name = DTy.getName();
1707 uint64_t Size = DTy.getSizeInBits() >> 3;
1708 unsigned Tag = DTy.getTag();
1709 // FIXME - Workaround for templates.
1710 if (Tag == DW_TAG_inheritance) Tag = DW_TAG_reference_type;
1713 // Map to main type, void will not have a type.
1714 DIType FromTy = DTy.getTypeDerivedFrom();
1715 AddType(DW_Unit, &Buffer, FromTy);
1717 // Add name if not anonymous or intermediate type.
1718 if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
1720 // Add size if non-zero (derived types might be zero-sized.)
1722 AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
1724 // Add source line info if available and TyDesc is not a forward
1726 // FIXME - Enable this. if (!DTy.isForwardDecl())
1727 // FIXME - Enable this. AddSourceLine(&Buffer, *DTy);
1730 /// ConstructTypeDIE - Construct type DIE from DICompositeType.
1731 void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
1732 DICompositeType CTy) {
1734 // Get core information.
1735 const std::string &Name = CTy.getName();
1736 uint64_t Size = CTy.getSizeInBits() >> 3;
1737 unsigned Tag = CTy.getTag();
1739 case DW_TAG_vector_type:
1740 case DW_TAG_array_type:
1741 ConstructArrayTypeDIE(DW_Unit, Buffer, &CTy);
1743 //FIXME - Enable this.
1744 // case DW_TAG_enumeration_type:
1745 // DIArray Elements = CTy.getTypeArray();
1746 // // Add enumerators to enumeration type.
1747 // for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i)
1748 // ConstructEnumTypeDIE(Buffer, &Elements.getElement(i));
1750 case DW_TAG_subroutine_type:
1752 // Add prototype flag.
1753 AddUInt(&Buffer, DW_AT_prototyped, DW_FORM_flag, 1);
1754 DIArray Elements = CTy.getTypeArray();
1756 DIDescriptor RTy = Elements.getElement(0);
1757 AddType(DW_Unit, &Buffer, DIType(RTy.getGV()));
1759 //AddType(DW_Unit, &Buffer, Elements.getElement(0));
1761 for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) {
1762 DIE *Arg = new DIE(DW_TAG_formal_parameter);
1763 DIDescriptor Ty = Elements.getElement(i);
1764 AddType(DW_Unit, &Buffer, DIType(Ty.getGV()));
1765 Buffer.AddChild(Arg);
1769 case DW_TAG_structure_type:
1770 case DW_TAG_union_type:
1772 // Add elements to structure type.
1773 DIArray Elements = CTy.getTypeArray();
1774 // Add elements to structure type.
1775 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
1776 DIDescriptor Element = Elements.getElement(i);
1777 if (Element.getTag() == dwarf::DW_TAG_subprogram)
1778 ConstructFieldTypeDIE(DW_Unit, Buffer, DISubprogram(Element.getGV()));
1779 else if (Element.getTag() == dwarf::DW_TAG_variable)
1780 ConstructFieldTypeDIE(DW_Unit, Buffer,
1781 DIGlobalVariable(Element.getGV()));
1783 DIDerivedType DT = DIDerivedType(Element.getGV());
1784 assert (DT.isDerivedType(DT.getTag()) && "Unexpected strcut element");
1785 ConstructFieldTypeDIE(DW_Unit, Buffer, DT);
1794 // Add name if not anonymous or intermediate type.
1795 if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
1797 // Add size if non-zero (derived types might be zero-sized.)
1799 AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
1801 // Add zero size even if it is not a forward declaration.
1802 // FIXME - Enable this.
1803 // if (!CTy.isDefinition())
1804 // AddUInt(&Buffer, DW_AT_declaration, DW_FORM_flag, 1);
1806 // AddUInt(&Buffer, DW_AT_byte_size, 0, 0);
1809 // Add source line info if available and TyDesc is not a forward
1811 // FIXME - Enable this.
1812 // if (CTy.isForwardDecl())
1813 // AddSourceLine(&Buffer, *CTy);
1816 // ConstructSubrangeDIE - Construct subrange DIE from DISubrange.
1817 void ConstructSubrangeDIE (DIE &Buffer, DISubrange SR, DIE *IndexTy) {
1818 int64_t L = SR.getLo();
1819 int64_t H = SR.getHi();
1820 DIE *DW_Subrange = new DIE(DW_TAG_subrange_type);
1822 AddDIEntry(DW_Subrange, DW_AT_type, DW_FORM_ref4, IndexTy);
1824 AddSInt(DW_Subrange, DW_AT_lower_bound, 0, L);
1825 AddSInt(DW_Subrange, DW_AT_upper_bound, 0, H);
1827 Buffer.AddChild(DW_Subrange);
1830 /// ConstructArrayTypeDIE - Construct array type DIE from DICompositeType.
1831 void ConstructArrayTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
1832 DICompositeType *CTy) {
1833 Buffer.setTag(DW_TAG_array_type);
1834 if (CTy->getTag() == DW_TAG_vector_type)
1835 AddUInt(&Buffer, DW_AT_GNU_vector, DW_FORM_flag, 1);
1837 DIArray Elements = CTy->getTypeArray();
1838 // FIXME - Enable this.
1839 AddType(DW_Unit, &Buffer, CTy->getTypeDerivedFrom());
1841 // Construct an anonymous type for index type.
1842 DIE IdxBuffer(DW_TAG_base_type);
1843 AddUInt(&IdxBuffer, DW_AT_byte_size, 0, sizeof(int32_t));
1844 AddUInt(&IdxBuffer, DW_AT_encoding, DW_FORM_data1, DW_ATE_signed);
1845 DIE *IndexTy = DW_Unit->AddDie(IdxBuffer);
1847 // Add subranges to array type.
1848 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
1849 DIDescriptor Element = Elements.getElement(i);
1850 if (Element.getTag() == dwarf::DW_TAG_subrange_type)
1851 ConstructSubrangeDIE(Buffer, DISubrange(Element.getGV()), IndexTy);
1855 /// ConstructEnumTypeDIE - Construct enum type DIE from
1857 void ConstructEnumTypeDIE(CompileUnit *DW_Unit,
1858 DIE &Buffer, DIEnumerator *ETy) {
1860 DIE *Enumerator = new DIE(DW_TAG_enumerator);
1861 AddString(Enumerator, DW_AT_name, DW_FORM_string, ETy->getName());
1862 int64_t Value = ETy->getEnumValue();
1863 AddSInt(Enumerator, DW_AT_const_value, DW_FORM_sdata, Value);
1864 Buffer.AddChild(Enumerator);
1867 /// ConstructFieldTypeDIE - Construct variable DIE for a struct field.
1868 void ConstructFieldTypeDIE(CompileUnit *DW_Unit,
1869 DIE &Buffer, DIGlobalVariable V) {
1871 DIE *VariableDie = new DIE(DW_TAG_variable);
1872 const std::string &LinkageName = V.getLinkageName();
1873 if (!LinkageName.empty())
1874 AddString(VariableDie, DW_AT_MIPS_linkage_name, DW_FORM_string,
1876 // FIXME - Enable this. AddSourceLine(VariableDie, V);
1877 AddType(DW_Unit, VariableDie, V.getType());
1878 if (!V.isLocalToUnit())
1879 AddUInt(VariableDie, DW_AT_external, DW_FORM_flag, 1);
1880 AddUInt(VariableDie, DW_AT_declaration, DW_FORM_flag, 1);
1881 Buffer.AddChild(VariableDie);
1884 /// ConstructFieldTypeDIE - Construct subprogram DIE for a struct field.
1885 void ConstructFieldTypeDIE(CompileUnit *DW_Unit,
1886 DIE &Buffer, DISubprogram SP,
1887 bool IsConstructor = false) {
1888 DIE *Method = new DIE(DW_TAG_subprogram);
1889 AddString(Method, DW_AT_name, DW_FORM_string, SP.getName());
1890 const std::string &LinkageName = SP.getLinkageName();
1891 if (!LinkageName.empty())
1892 AddString(Method, DW_AT_MIPS_linkage_name, DW_FORM_string, LinkageName);
1893 // FIXME - Enable this. AddSourceLine(Method, SP);
1895 DICompositeType MTy = SP.getType();
1896 DIArray Args = MTy.getTypeArray();
1900 AddType(DW_Unit, Method, DIType(Args.getElement(0).getGV()));
1903 for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
1904 DIE *Arg = new DIE(DW_TAG_formal_parameter);
1905 AddType(DW_Unit, Method, DIType(Args.getElement(i).getGV()));
1906 AddUInt(Arg, DW_AT_artificial, DW_FORM_flag, 1); // ???
1907 Method->AddChild(Arg);
1910 if (!SP.isLocalToUnit())
1911 AddUInt(Method, DW_AT_external, DW_FORM_flag, 1);
1912 Buffer.AddChild(Method);
1915 /// ConstructFieldTypeDIE - Construct derived type DIE for a struct field.
1916 void ConstructFieldTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
1917 DIDerivedType DTy) {
1918 unsigned Tag = DTy.getTag();
1919 DIE *MemberDie = new DIE(Tag);
1920 if (!DTy.getName().empty())
1921 AddString(MemberDie, DW_AT_name, DW_FORM_string, DTy.getName());
1922 // FIXME - Enable this. AddSourceLine(MemberDie, DTy);
1924 DIType FromTy = DTy.getTypeDerivedFrom();
1925 AddType(DW_Unit, MemberDie, FromTy);
1927 uint64_t Size = DTy.getSizeInBits();
1928 uint64_t Offset = DTy.getOffsetInBits();
1930 // FIXME Handle bitfields
1933 AddUInt(MemberDie, DW_AT_bit_size, 0, Size);
1934 // Add computation for offset.
1935 DIEBlock *Block = new DIEBlock();
1936 AddUInt(Block, 0, DW_FORM_data1, DW_OP_plus_uconst);
1937 AddUInt(Block, 0, DW_FORM_udata, Offset >> 3);
1938 AddBlock(MemberDie, DW_AT_data_member_location, 0, Block);
1940 // FIXME Handle DW_AT_accessibility.
1942 Buffer.AddChild(MemberDie);
1945 /// FindCompileUnit - Get the compile unit for the given descriptor.
1947 CompileUnit *FindCompileUnit(DICompileUnit Unit) {
1948 CompileUnit *DW_Unit = DW_CUs[Unit.getGV()];
1949 assert(DW_Unit && "Missing compile unit.");
1953 /// NewDbgScopeVariable - Create a new scope variable.
1955 DIE *NewDbgScopeVariable(DbgVariable *DV, CompileUnit *Unit) {
1956 // Get the descriptor.
1957 DIVariable *VD = DV->getVariable();
1959 // Translate tag to proper Dwarf tag. The result variable is dropped for
1962 switch (VD->getTag()) {
1963 case DW_TAG_return_variable: return NULL;
1964 case DW_TAG_arg_variable: Tag = DW_TAG_formal_parameter; break;
1965 case DW_TAG_auto_variable: // fall thru
1966 default: Tag = DW_TAG_variable; break;
1969 // Define variable debug information entry.
1970 DIE *VariableDie = new DIE(Tag);
1971 AddString(VariableDie, DW_AT_name, DW_FORM_string, VD->getName());
1973 // Add source line info if available.
1974 AddSourceLine(VariableDie, VD);
1976 // Add variable type.
1977 AddType(Unit, VariableDie, VD->getType());
1979 // Add variable address.
1980 MachineLocation Location;
1981 Location.set(RI->getFrameRegister(*MF),
1982 RI->getFrameIndexOffset(*MF, DV->getFrameIndex()));
1983 AddAddress(VariableDie, DW_AT_location, Location);
1988 /// getOrCreateScope - Returns the scope associated with the given descriptor.
1990 DbgScope *getOrCreateScope(GlobalVariable *V) {
1991 DbgScope *&Slot = DbgScopeMap[V];
1993 // FIXME - breaks down when the context is an inlined function.
1994 DIDescriptor ParentDesc;
1995 DIDescriptor Desc(V);
1996 if (Desc.getTag() == dwarf::DW_TAG_lexical_block) {
1998 ParentDesc = Block.getContext();
2000 DbgScope *Parent = ParentDesc.isNull() ?
2001 NULL : getOrCreateScope(ParentDesc.getGV());
2002 Slot = new DbgScope(Parent, Desc);
2004 Parent->AddScope(Slot);
2005 } else if (RootDbgScope) {
2006 // FIXME - Add inlined function scopes to the root so we can delete
2007 // them later. Long term, handle inlined functions properly.
2008 RootDbgScope->AddScope(Slot);
2010 // First function is top level function.
2011 RootDbgScope = Slot;
2017 /// ConstructDbgScope - Construct the components of a scope.
2019 void ConstructDbgScope(DbgScope *ParentScope,
2020 unsigned ParentStartID, unsigned ParentEndID,
2021 DIE *ParentDie, CompileUnit *Unit) {
2022 // Add variables to scope.
2023 SmallVector<DbgVariable *, 8> &Variables = ParentScope->getVariables();
2024 for (unsigned i = 0, N = Variables.size(); i < N; ++i) {
2025 DIE *VariableDie = NewDbgScopeVariable(Variables[i], Unit);
2026 if (VariableDie) ParentDie->AddChild(VariableDie);
2029 // Add nested scopes.
2030 SmallVector<DbgScope *, 4> &Scopes = ParentScope->getScopes();
2031 for (unsigned j = 0, M = Scopes.size(); j < M; ++j) {
2032 // Define the Scope debug information entry.
2033 DbgScope *Scope = Scopes[j];
2034 // FIXME - Ignore inlined functions for the time being.
2035 if (!Scope->getParent()) continue;
2037 unsigned StartID = MMI->MappedLabel(Scope->getStartLabelID());
2038 unsigned EndID = MMI->MappedLabel(Scope->getEndLabelID());
2040 // Ignore empty scopes.
2041 if (StartID == EndID && StartID != 0) continue;
2042 if (Scope->getScopes().empty() && Scope->getVariables().empty()) continue;
2044 if (StartID == ParentStartID && EndID == ParentEndID) {
2045 // Just add stuff to the parent scope.
2046 ConstructDbgScope(Scope, ParentStartID, ParentEndID, ParentDie, Unit);
2048 DIE *ScopeDie = new DIE(DW_TAG_lexical_block);
2050 // Add the scope bounds.
2052 AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr,
2053 DWLabel("label", StartID));
2055 AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr,
2056 DWLabel("func_begin", SubprogramCount));
2059 AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr,
2060 DWLabel("label", EndID));
2062 AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr,
2063 DWLabel("func_end", SubprogramCount));
2066 // Add the scope contents.
2067 ConstructDbgScope(Scope, StartID, EndID, ScopeDie, Unit);
2068 ParentDie->AddChild(ScopeDie);
2073 /// ConstructRootDbgScope - Construct the scope for the subprogram.
2075 void ConstructRootDbgScope(DbgScope *RootScope) {
2076 // Exit if there is no root scope.
2077 if (!RootScope) return;
2078 DIDescriptor Desc = RootScope->getDesc();
2082 // Get the subprogram debug information entry.
2083 DISubprogram SPD(Desc.getGV());
2085 // Get the compile unit context.
2086 CompileUnit *Unit = FindCompileUnit(SPD.getCompileUnit());
2088 // Get the subprogram die.
2089 DIE *SPDie = Unit->getDieMapSlotFor(SPD.getGV());
2090 assert(SPDie && "Missing subprogram descriptor");
2092 // Add the function bounds.
2093 AddLabel(SPDie, DW_AT_low_pc, DW_FORM_addr,
2094 DWLabel("func_begin", SubprogramCount));
2095 AddLabel(SPDie, DW_AT_high_pc, DW_FORM_addr,
2096 DWLabel("func_end", SubprogramCount));
2097 MachineLocation Location(RI->getFrameRegister(*MF));
2098 AddAddress(SPDie, DW_AT_frame_base, Location);
2100 ConstructDbgScope(RootScope, 0, 0, SPDie, Unit);
2103 /// ConstructDefaultDbgScope - Construct a default scope for the subprogram.
2105 void ConstructDefaultDbgScope(MachineFunction *MF) {
2106 // Find the correct subprogram descriptor.
2107 std::string SPName = "llvm.dbg.subprograms";
2108 std::vector<GlobalVariable*> Result;
2109 getGlobalVariablesUsing(*M, SPName, Result);
2110 for (std::vector<GlobalVariable *>::iterator I = Result.begin(),
2111 E = Result.end(); I != E; ++I) {
2113 DISubprogram *SPD = new DISubprogram(*I);
2115 if (SPD->getName() == MF->getFunction()->getName()) {
2116 // Get the compile unit context.
2117 CompileUnit *Unit = FindCompileUnit(SPD->getCompileUnit());
2119 // Get the subprogram die.
2120 DIE *SPDie = Unit->getDieMapSlotFor(SPD->getGV());
2121 assert(SPDie && "Missing subprogram descriptor");
2123 // Add the function bounds.
2124 AddLabel(SPDie, DW_AT_low_pc, DW_FORM_addr,
2125 DWLabel("func_begin", SubprogramCount));
2126 AddLabel(SPDie, DW_AT_high_pc, DW_FORM_addr,
2127 DWLabel("func_end", SubprogramCount));
2129 MachineLocation Location(RI->getFrameRegister(*MF));
2130 AddAddress(SPDie, DW_AT_frame_base, Location);
2135 // FIXME: This is causing an abort because C++ mangled names are compared
2136 // with their unmangled counterparts. See PR2885. Don't do this assert.
2137 assert(0 && "Couldn't find DIE for machine function!");
2141 /// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc
2142 /// tools to recognize the object file contains Dwarf information.
2143 void EmitInitial() {
2144 // Check to see if we already emitted intial headers.
2145 if (didInitial) return;
2148 // Dwarf sections base addresses.
2149 if (TAI->doesDwarfRequireFrameSection()) {
2150 Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
2151 EmitLabel("section_debug_frame", 0);
2153 Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
2154 EmitLabel("section_info", 0);
2155 Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection());
2156 EmitLabel("section_abbrev", 0);
2157 Asm->SwitchToDataSection(TAI->getDwarfARangesSection());
2158 EmitLabel("section_aranges", 0);
2159 Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection());
2160 EmitLabel("section_macinfo", 0);
2161 Asm->SwitchToDataSection(TAI->getDwarfLineSection());
2162 EmitLabel("section_line", 0);
2163 Asm->SwitchToDataSection(TAI->getDwarfLocSection());
2164 EmitLabel("section_loc", 0);
2165 Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection());
2166 EmitLabel("section_pubnames", 0);
2167 Asm->SwitchToDataSection(TAI->getDwarfStrSection());
2168 EmitLabel("section_str", 0);
2169 Asm->SwitchToDataSection(TAI->getDwarfRangesSection());
2170 EmitLabel("section_ranges", 0);
2172 Asm->SwitchToSection(TAI->getTextSection());
2173 EmitLabel("text_begin", 0);
2174 Asm->SwitchToSection(TAI->getDataSection());
2175 EmitLabel("data_begin", 0);
2178 /// EmitDIE - Recusively Emits a debug information entry.
2180 void EmitDIE(DIE *Die) {
2181 // Get the abbreviation for this DIE.
2182 unsigned AbbrevNumber = Die->getAbbrevNumber();
2183 const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
2187 // Emit the code (index) for the abbreviation.
2188 Asm->EmitULEB128Bytes(AbbrevNumber);
2191 Asm->EOL(std::string("Abbrev [" +
2192 utostr(AbbrevNumber) +
2193 "] 0x" + utohexstr(Die->getOffset()) +
2194 ":0x" + utohexstr(Die->getSize()) + " " +
2195 TagString(Abbrev->getTag())));
2199 SmallVector<DIEValue*, 32> &Values = Die->getValues();
2200 const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData();
2202 // Emit the DIE attribute values.
2203 for (unsigned i = 0, N = Values.size(); i < N; ++i) {
2204 unsigned Attr = AbbrevData[i].getAttribute();
2205 unsigned Form = AbbrevData[i].getForm();
2206 assert(Form && "Too many attributes for DIE (check abbreviation)");
2209 case DW_AT_sibling: {
2210 Asm->EmitInt32(Die->SiblingOffset());
2214 // Emit an attribute using the defined form.
2215 Values[i]->EmitValue(*this, Form);
2220 Asm->EOL(AttributeString(Attr));
2223 // Emit the DIE children if any.
2224 if (Abbrev->getChildrenFlag() == DW_CHILDREN_yes) {
2225 const std::vector<DIE *> &Children = Die->getChildren();
2227 for (unsigned j = 0, M = Children.size(); j < M; ++j) {
2228 EmitDIE(Children[j]);
2231 Asm->EmitInt8(0); Asm->EOL("End Of Children Mark");
2235 /// SizeAndOffsetDie - Compute the size and offset of a DIE.
2237 unsigned SizeAndOffsetDie(DIE *Die, unsigned Offset, bool Last) {
2238 // Get the children.
2239 const std::vector<DIE *> &Children = Die->getChildren();
2241 // If not last sibling and has children then add sibling offset attribute.
2242 if (!Last && !Children.empty()) Die->AddSiblingOffset();
2244 // Record the abbreviation.
2245 AssignAbbrevNumber(Die->getAbbrev());
2247 // Get the abbreviation for this DIE.
2248 unsigned AbbrevNumber = Die->getAbbrevNumber();
2249 const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
2252 Die->setOffset(Offset);
2254 // Start the size with the size of abbreviation code.
2255 Offset += TargetAsmInfo::getULEB128Size(AbbrevNumber);
2257 const SmallVector<DIEValue*, 32> &Values = Die->getValues();
2258 const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData();
2260 // Size the DIE attribute values.
2261 for (unsigned i = 0, N = Values.size(); i < N; ++i) {
2262 // Size attribute value.
2263 Offset += Values[i]->SizeOf(*this, AbbrevData[i].getForm());
2266 // Size the DIE children if any.
2267 if (!Children.empty()) {
2268 assert(Abbrev->getChildrenFlag() == DW_CHILDREN_yes &&
2269 "Children flag not set");
2271 for (unsigned j = 0, M = Children.size(); j < M; ++j) {
2272 Offset = SizeAndOffsetDie(Children[j], Offset, (j + 1) == M);
2275 // End of children marker.
2276 Offset += sizeof(int8_t);
2279 Die->setSize(Offset - Die->getOffset());
2283 /// SizeAndOffsets - Compute the size and offset of all the DIEs.
2285 void SizeAndOffsets() {
2286 // Process base compile unit.
2287 for (DenseMap<Value *, CompileUnit *>::iterator CI = DW_CUs.begin(),
2288 CE = DW_CUs.end(); CI != CE; ++CI) {
2289 CompileUnit *Unit = CI->second;
2290 // Compute size of compile unit header
2291 unsigned Offset = sizeof(int32_t) + // Length of Compilation Unit Info
2292 sizeof(int16_t) + // DWARF version number
2293 sizeof(int32_t) + // Offset Into Abbrev. Section
2294 sizeof(int8_t); // Pointer Size (in bytes)
2295 SizeAndOffsetDie(Unit->getDie(), Offset, true);
2299 /// EmitDebugInfo - Emit the debug info section.
2301 void EmitDebugInfo() {
2302 // Start debug info section.
2303 Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
2305 for (DenseMap<Value *, CompileUnit *>::iterator CI = DW_CUs.begin(),
2306 CE = DW_CUs.end(); CI != CE; ++CI) {
2307 CompileUnit *Unit = CI->second;
2308 DIE *Die = Unit->getDie();
2309 // Emit the compile units header.
2310 EmitLabel("info_begin", Unit->getID());
2311 // Emit size of content not including length itself
2312 unsigned ContentSize = Die->getSize() +
2313 sizeof(int16_t) + // DWARF version number
2314 sizeof(int32_t) + // Offset Into Abbrev. Section
2315 sizeof(int8_t) + // Pointer Size (in bytes)
2316 sizeof(int32_t); // FIXME - extra pad for gdb bug.
2318 Asm->EmitInt32(ContentSize); Asm->EOL("Length of Compilation Unit Info");
2319 Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF version number");
2320 EmitSectionOffset("abbrev_begin", "section_abbrev", 0, 0, true, false);
2321 Asm->EOL("Offset Into Abbrev. Section");
2322 Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Address Size (in bytes)");
2325 // FIXME - extra padding for gdb bug.
2326 Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
2327 Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
2328 Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
2329 Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
2330 EmitLabel("info_end", Unit->getID());
2336 /// EmitAbbreviations - Emit the abbreviation section.
2338 void EmitAbbreviations() const {
2339 // Check to see if it is worth the effort.
2340 if (!Abbreviations.empty()) {
2341 // Start the debug abbrev section.
2342 Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection());
2344 EmitLabel("abbrev_begin", 0);
2346 // For each abbrevation.
2347 for (unsigned i = 0, N = Abbreviations.size(); i < N; ++i) {
2348 // Get abbreviation data
2349 const DIEAbbrev *Abbrev = Abbreviations[i];
2351 // Emit the abbrevations code (base 1 index.)
2352 Asm->EmitULEB128Bytes(Abbrev->getNumber());
2353 Asm->EOL("Abbreviation Code");
2355 // Emit the abbreviations data.
2356 Abbrev->Emit(*this);
2361 // Mark end of abbreviations.
2362 Asm->EmitULEB128Bytes(0); Asm->EOL("EOM(3)");
2364 EmitLabel("abbrev_end", 0);
2370 /// EmitEndOfLineMatrix - Emit the last address of the section and the end of
2371 /// the line matrix.
2373 void EmitEndOfLineMatrix(unsigned SectionEnd) {
2374 // Define last address of section.
2375 Asm->EmitInt8(0); Asm->EOL("Extended Op");
2376 Asm->EmitInt8(TD->getPointerSize() + 1); Asm->EOL("Op size");
2377 Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
2378 EmitReference("section_end", SectionEnd); Asm->EOL("Section end label");
2380 // Mark end of matrix.
2381 Asm->EmitInt8(0); Asm->EOL("DW_LNE_end_sequence");
2382 Asm->EmitULEB128Bytes(1); Asm->EOL();
2383 Asm->EmitInt8(1); Asm->EOL();
2386 /// EmitDebugLines - Emit source line information.
2388 void EmitDebugLines() {
2389 // If the target is using .loc/.file, the assembler will be emitting the
2390 // .debug_line table automatically.
2391 if (TAI->hasDotLocAndDotFile())
2394 // Minimum line delta, thus ranging from -10..(255-10).
2395 const int MinLineDelta = -(DW_LNS_fixed_advance_pc + 1);
2396 // Maximum line delta, thus ranging from -10..(255-10).
2397 const int MaxLineDelta = 255 + MinLineDelta;
2399 // Start the dwarf line section.
2400 Asm->SwitchToDataSection(TAI->getDwarfLineSection());
2402 // Construct the section header.
2404 EmitDifference("line_end", 0, "line_begin", 0, true);
2405 Asm->EOL("Length of Source Line Info");
2406 EmitLabel("line_begin", 0);
2408 Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF version number");
2410 EmitDifference("line_prolog_end", 0, "line_prolog_begin", 0, true);
2411 Asm->EOL("Prolog Length");
2412 EmitLabel("line_prolog_begin", 0);
2414 Asm->EmitInt8(1); Asm->EOL("Minimum Instruction Length");
2416 Asm->EmitInt8(1); Asm->EOL("Default is_stmt_start flag");
2418 Asm->EmitInt8(MinLineDelta); Asm->EOL("Line Base Value (Special Opcodes)");
2420 Asm->EmitInt8(MaxLineDelta); Asm->EOL("Line Range Value (Special Opcodes)");
2422 Asm->EmitInt8(-MinLineDelta); Asm->EOL("Special Opcode Base");
2424 // Line number standard opcode encodings argument count
2425 Asm->EmitInt8(0); Asm->EOL("DW_LNS_copy arg count");
2426 Asm->EmitInt8(1); Asm->EOL("DW_LNS_advance_pc arg count");
2427 Asm->EmitInt8(1); Asm->EOL("DW_LNS_advance_line arg count");
2428 Asm->EmitInt8(1); Asm->EOL("DW_LNS_set_file arg count");
2429 Asm->EmitInt8(1); Asm->EOL("DW_LNS_set_column arg count");
2430 Asm->EmitInt8(0); Asm->EOL("DW_LNS_negate_stmt arg count");
2431 Asm->EmitInt8(0); Asm->EOL("DW_LNS_set_basic_block arg count");
2432 Asm->EmitInt8(0); Asm->EOL("DW_LNS_const_add_pc arg count");
2433 Asm->EmitInt8(1); Asm->EOL("DW_LNS_fixed_advance_pc arg count");
2435 // Emit directories.
2436 for (unsigned DirectoryID = 1, NDID = Directories.size();
2437 DirectoryID <= NDID; ++DirectoryID) {
2438 Asm->EmitString(Directories[DirectoryID]); Asm->EOL("Directory");
2440 Asm->EmitInt8(0); Asm->EOL("End of directories");
2443 for (unsigned SourceID = 1, NSID = SrcFiles.size();
2444 SourceID <= NSID; ++SourceID) {
2445 const SrcFileInfo &SourceFile = SrcFiles[SourceID];
2446 Asm->EmitString(SourceFile.getName());
2448 Asm->EmitULEB128Bytes(SourceFile.getDirectoryID());
2449 Asm->EOL("Directory #");
2450 Asm->EmitULEB128Bytes(0);
2451 Asm->EOL("Mod date");
2452 Asm->EmitULEB128Bytes(0);
2453 Asm->EOL("File size");
2455 Asm->EmitInt8(0); Asm->EOL("End of files");
2457 EmitLabel("line_prolog_end", 0);
2459 // A sequence for each text section.
2460 unsigned SecSrcLinesSize = SectionSourceLines.size();
2462 for (unsigned j = 0; j < SecSrcLinesSize; ++j) {
2463 // Isolate current sections line info.
2464 const std::vector<SrcLineInfo> &LineInfos = SectionSourceLines[j];
2467 const Section* S = SectionMap[j + 1];
2468 Asm->EOL(std::string("Section ") + S->getName());
2472 // Dwarf assumes we start with first line of first source file.
2473 unsigned Source = 1;
2476 // Construct rows of the address, source, line, column matrix.
2477 for (unsigned i = 0, N = LineInfos.size(); i < N; ++i) {
2478 const SrcLineInfo &LineInfo = LineInfos[i];
2479 unsigned LabelID = MMI->MappedLabel(LineInfo.getLabelID());
2480 if (!LabelID) continue;
2482 unsigned SourceID = LineInfo.getSourceID();
2483 const SrcFileInfo &SourceFile = SrcFiles[SourceID];
2484 unsigned DirectoryID = SourceFile.getDirectoryID();
2486 Asm->EOL(Directories[DirectoryID]
2487 + SourceFile.getName()
2489 + utostr_32(LineInfo.getLine()));
2493 // Define the line address.
2494 Asm->EmitInt8(0); Asm->EOL("Extended Op");
2495 Asm->EmitInt8(TD->getPointerSize() + 1); Asm->EOL("Op size");
2496 Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
2497 EmitReference("label", LabelID); Asm->EOL("Location label");
2499 // If change of source, then switch to the new source.
2500 if (Source != LineInfo.getSourceID()) {
2501 Source = LineInfo.getSourceID();
2502 Asm->EmitInt8(DW_LNS_set_file); Asm->EOL("DW_LNS_set_file");
2503 Asm->EmitULEB128Bytes(Source); Asm->EOL("New Source");
2506 // If change of line.
2507 if (Line != LineInfo.getLine()) {
2508 // Determine offset.
2509 int Offset = LineInfo.getLine() - Line;
2510 int Delta = Offset - MinLineDelta;
2513 Line = LineInfo.getLine();
2515 // If delta is small enough and in range...
2516 if (Delta >= 0 && Delta < (MaxLineDelta - 1)) {
2517 // ... then use fast opcode.
2518 Asm->EmitInt8(Delta - MinLineDelta); Asm->EOL("Line Delta");
2520 // ... otherwise use long hand.
2521 Asm->EmitInt8(DW_LNS_advance_line); Asm->EOL("DW_LNS_advance_line");
2522 Asm->EmitSLEB128Bytes(Offset); Asm->EOL("Line Offset");
2523 Asm->EmitInt8(DW_LNS_copy); Asm->EOL("DW_LNS_copy");
2526 // Copy the previous row (different address or source)
2527 Asm->EmitInt8(DW_LNS_copy); Asm->EOL("DW_LNS_copy");
2531 EmitEndOfLineMatrix(j + 1);
2534 if (SecSrcLinesSize == 0)
2535 // Because we're emitting a debug_line section, we still need a line
2536 // table. The linker and friends expect it to exist. If there's nothing to
2537 // put into it, emit an empty table.
2538 EmitEndOfLineMatrix(1);
2540 EmitLabel("line_end", 0);
2545 /// EmitCommonDebugFrame - Emit common frame info into a debug frame section.
2547 void EmitCommonDebugFrame() {
2548 if (!TAI->doesDwarfRequireFrameSection())
2552 Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
2553 TargetFrameInfo::StackGrowsUp ?
2554 TD->getPointerSize() : -TD->getPointerSize();
2556 // Start the dwarf frame section.
2557 Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
2559 EmitLabel("debug_frame_common", 0);
2560 EmitDifference("debug_frame_common_end", 0,
2561 "debug_frame_common_begin", 0, true);
2562 Asm->EOL("Length of Common Information Entry");
2564 EmitLabel("debug_frame_common_begin", 0);
2565 Asm->EmitInt32((int)DW_CIE_ID);
2566 Asm->EOL("CIE Identifier Tag");
2567 Asm->EmitInt8(DW_CIE_VERSION);
2568 Asm->EOL("CIE Version");
2569 Asm->EmitString("");
2570 Asm->EOL("CIE Augmentation");
2571 Asm->EmitULEB128Bytes(1);
2572 Asm->EOL("CIE Code Alignment Factor");
2573 Asm->EmitSLEB128Bytes(stackGrowth);
2574 Asm->EOL("CIE Data Alignment Factor");
2575 Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), false));
2576 Asm->EOL("CIE RA Column");
2578 std::vector<MachineMove> Moves;
2579 RI->getInitialFrameState(Moves);
2581 EmitFrameMoves(NULL, 0, Moves, false);
2583 Asm->EmitAlignment(2, 0, 0, false);
2584 EmitLabel("debug_frame_common_end", 0);
2589 /// EmitFunctionDebugFrame - Emit per function frame info into a debug frame
2591 void EmitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo) {
2592 if (!TAI->doesDwarfRequireFrameSection())
2595 // Start the dwarf frame section.
2596 Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
2598 EmitDifference("debug_frame_end", DebugFrameInfo.Number,
2599 "debug_frame_begin", DebugFrameInfo.Number, true);
2600 Asm->EOL("Length of Frame Information Entry");
2602 EmitLabel("debug_frame_begin", DebugFrameInfo.Number);
2604 EmitSectionOffset("debug_frame_common", "section_debug_frame",
2606 Asm->EOL("FDE CIE offset");
2608 EmitReference("func_begin", DebugFrameInfo.Number);
2609 Asm->EOL("FDE initial location");
2610 EmitDifference("func_end", DebugFrameInfo.Number,
2611 "func_begin", DebugFrameInfo.Number);
2612 Asm->EOL("FDE address range");
2614 EmitFrameMoves("func_begin", DebugFrameInfo.Number, DebugFrameInfo.Moves, false);
2616 Asm->EmitAlignment(2, 0, 0, false);
2617 EmitLabel("debug_frame_end", DebugFrameInfo.Number);
2622 /// EmitDebugPubNames - Emit visible names into a debug pubnames section.
2624 void EmitDebugPubNames() {
2625 // Start the dwarf pubnames section.
2626 Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection());
2628 for (DenseMap<Value *, CompileUnit *>::iterator CI = DW_CUs.begin(),
2629 CE = DW_CUs.end(); CI != CE; ++CI) {
2630 CompileUnit *Unit = CI->second;
2632 EmitDifference("pubnames_end", Unit->getID(),
2633 "pubnames_begin", Unit->getID(), true);
2634 Asm->EOL("Length of Public Names Info");
2636 EmitLabel("pubnames_begin", Unit->getID());
2638 Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF Version");
2640 EmitSectionOffset("info_begin", "section_info",
2641 Unit->getID(), 0, true, false);
2642 Asm->EOL("Offset of Compilation Unit Info");
2644 EmitDifference("info_end", Unit->getID(), "info_begin", Unit->getID(),true);
2645 Asm->EOL("Compilation Unit Length");
2647 std::map<std::string, DIE *> &Globals = Unit->getGlobals();
2649 for (std::map<std::string, DIE *>::iterator GI = Globals.begin(),
2652 const std::string &Name = GI->first;
2653 DIE * Entity = GI->second;
2655 Asm->EmitInt32(Entity->getOffset()); Asm->EOL("DIE offset");
2656 Asm->EmitString(Name); Asm->EOL("External Name");
2659 Asm->EmitInt32(0); Asm->EOL("End Mark");
2660 EmitLabel("pubnames_end", Unit->getID());
2666 /// EmitDebugStr - Emit visible names into a debug str section.
2668 void EmitDebugStr() {
2669 // Check to see if it is worth the effort.
2670 if (!StringPool.empty()) {
2671 // Start the dwarf str section.
2672 Asm->SwitchToDataSection(TAI->getDwarfStrSection());
2674 // For each of strings in the string pool.
2675 for (unsigned StringID = 1, N = StringPool.size();
2676 StringID <= N; ++StringID) {
2677 // Emit a label for reference from debug information entries.
2678 EmitLabel("string", StringID);
2679 // Emit the string itself.
2680 const std::string &String = StringPool[StringID];
2681 Asm->EmitString(String); Asm->EOL();
2688 /// EmitDebugLoc - Emit visible names into a debug loc section.
2690 void EmitDebugLoc() {
2691 // Start the dwarf loc section.
2692 Asm->SwitchToDataSection(TAI->getDwarfLocSection());
2697 /// EmitDebugARanges - Emit visible names into a debug aranges section.
2699 void EmitDebugARanges() {
2700 // Start the dwarf aranges section.
2701 Asm->SwitchToDataSection(TAI->getDwarfARangesSection());
2705 CompileUnit *Unit = GetBaseCompileUnit();
2707 // Don't include size of length
2708 Asm->EmitInt32(0x1c); Asm->EOL("Length of Address Ranges Info");
2710 Asm->EmitInt16(DWARF_VERSION); Asm->EOL("Dwarf Version");
2712 EmitReference("info_begin", Unit->getID());
2713 Asm->EOL("Offset of Compilation Unit Info");
2715 Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Size of Address");
2717 Asm->EmitInt8(0); Asm->EOL("Size of Segment Descriptor");
2719 Asm->EmitInt16(0); Asm->EOL("Pad (1)");
2720 Asm->EmitInt16(0); Asm->EOL("Pad (2)");
2723 EmitReference("text_begin", 0); Asm->EOL("Address");
2724 EmitDifference("text_end", 0, "text_begin", 0, true); Asm->EOL("Length");
2726 Asm->EmitInt32(0); Asm->EOL("EOM (1)");
2727 Asm->EmitInt32(0); Asm->EOL("EOM (2)");
2733 /// EmitDebugRanges - Emit visible names into a debug ranges section.
2735 void EmitDebugRanges() {
2736 // Start the dwarf ranges section.
2737 Asm->SwitchToDataSection(TAI->getDwarfRangesSection());
2742 /// EmitDebugMacInfo - Emit visible names into a debug macinfo section.
2744 void EmitDebugMacInfo() {
2745 // Start the dwarf macinfo section.
2746 Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection());
2751 /// ConstructCompileUnits - Create a compile unit DIEs.
2752 void ConstructCompileUnits() {
2753 std::string CUName = "llvm.dbg.compile_units";
2754 std::vector<GlobalVariable*> Result;
2755 getGlobalVariablesUsing(*M, CUName, Result);
2756 for (std::vector<GlobalVariable *>::iterator RI = Result.begin(),
2757 RE = Result.end(); RI != RE; ++RI) {
2758 DICompileUnit *DIUnit = new DICompileUnit(*RI);
2759 unsigned ID = RecordSource(DIUnit->getDirectory(),
2760 DIUnit->getFilename());
2762 DIE *Die = new DIE(DW_TAG_compile_unit);
2763 AddSectionOffset(Die, DW_AT_stmt_list, DW_FORM_data4,
2764 DWLabel("section_line", 0), DWLabel("section_line", 0),
2766 AddString(Die, DW_AT_producer, DW_FORM_string, DIUnit->getProducer());
2767 AddUInt(Die, DW_AT_language, DW_FORM_data1, DIUnit->getLanguage());
2768 AddString(Die, DW_AT_name, DW_FORM_string, DIUnit->getFilename());
2769 if (!DIUnit->getDirectory().empty())
2770 AddString(Die, DW_AT_comp_dir, DW_FORM_string, DIUnit->getDirectory());
2772 CompileUnit *Unit = new CompileUnit(ID, Die);
2773 DW_CUs[DIUnit->getGV()] = Unit;
2777 /// ConstructGlobalVariableDIEs - Create DIEs for each of the externally
2778 /// visible global variables.
2779 void ConstructGlobalVariableDIEs() {
2780 std::string GVName = "llvm.dbg.global_variables";
2781 std::vector<GlobalVariable*> Result;
2782 getGlobalVariablesUsing(*M, GVName, Result);
2783 for (std::vector<GlobalVariable *>::iterator GVI = Result.begin(),
2784 GVE = Result.end(); GVI != GVE; ++GVI) {
2785 DIGlobalVariable *DI_GV = new DIGlobalVariable(*GVI);
2786 CompileUnit *DW_Unit = FindCompileUnit(DI_GV->getCompileUnit());
2788 // Check for pre-existence.
2789 DIE *&Slot = DW_Unit->getDieMapSlotFor(DI_GV->getGV());
2792 DIE *VariableDie = new DIE(DW_TAG_variable);
2793 AddString(VariableDie, DW_AT_name, DW_FORM_string, DI_GV->getName());
2794 const std::string &LinkageName = DI_GV->getLinkageName();
2795 if (!LinkageName.empty())
2796 AddString(VariableDie, DW_AT_MIPS_linkage_name, DW_FORM_string,
2798 AddType(DW_Unit, VariableDie, DI_GV->getType());
2800 if (!DI_GV->isLocalToUnit())
2801 AddUInt(VariableDie, DW_AT_external, DW_FORM_flag, 1);
2803 // Add source line info, if available.
2804 AddSourceLine(VariableDie, DI_GV);
2807 DIEBlock *Block = new DIEBlock();
2808 AddUInt(Block, 0, DW_FORM_data1, DW_OP_addr);
2809 AddObjectLabel(Block, 0, DW_FORM_udata,
2810 Asm->getGlobalLinkName(DI_GV->getGV()));
2811 AddBlock(VariableDie, DW_AT_location, 0, Block);
2816 //Add to context owner.
2817 DW_Unit->getDie()->AddChild(VariableDie);
2819 //Expose as global. FIXME - need to check external flag.
2820 DW_Unit->AddGlobal(DI_GV->getName(), VariableDie);
2824 /// ConstructSubprograms - Create DIEs for each of the externally visible
2826 void ConstructSubprograms() {
2828 std::string SPName = "llvm.dbg.subprograms";
2829 std::vector<GlobalVariable*> Result;
2830 getGlobalVariablesUsing(*M, SPName, Result);
2831 for (std::vector<GlobalVariable *>::iterator RI = Result.begin(),
2832 RE = Result.end(); RI != RE; ++RI) {
2834 DISubprogram *SP = new DISubprogram(*RI);
2835 CompileUnit *Unit = FindCompileUnit(SP->getCompileUnit());
2837 // Check for pre-existence.
2838 DIE *&Slot = Unit->getDieMapSlotFor(SP->getGV());
2841 DIE *SubprogramDie = new DIE(DW_TAG_subprogram);
2842 AddString(SubprogramDie, DW_AT_name, DW_FORM_string, SP->getName());
2843 const std::string &LinkageName = SP->getLinkageName();
2844 if (!LinkageName.empty())
2845 AddString(SubprogramDie, DW_AT_MIPS_linkage_name, DW_FORM_string,
2847 DIType SPTy = SP->getType();
2848 AddType(Unit, SubprogramDie, SPTy);
2849 if (!SP->isLocalToUnit())
2850 AddUInt(SubprogramDie, DW_AT_external, DW_FORM_flag, 1);
2851 AddUInt(SubprogramDie, DW_AT_prototyped, DW_FORM_flag, 1);
2853 AddSourceLine(SubprogramDie, SP);
2855 Slot = SubprogramDie;
2856 //Add to context owner.
2857 Unit->getDie()->AddChild(SubprogramDie);
2859 Unit->AddGlobal(SP->getName(), SubprogramDie);
2864 //===--------------------------------------------------------------------===//
2865 // Main entry points.
2867 DwarfDebug(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
2868 : Dwarf(OS, A, T, "dbg")
2870 , AbbreviationsSet(InitAbbreviationsSetSize)
2872 , ValuesSet(InitValuesSetSize)
2876 , SectionSourceLines()
2879 , RootDbgScope(NULL)
2882 virtual ~DwarfDebug() {
2883 for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i)
2884 delete CompileUnits[i];
2885 for (unsigned j = 0, M = Values.size(); j < M; ++j)
2889 /// SetDebugInfo - Create global DIEs and emit initial debug info sections.
2890 /// This is inovked by the target AsmPrinter.
2891 void SetDebugInfo(MachineModuleInfo *mmi) {
2893 // Create all the compile unit DIEs.
2894 ConstructCompileUnits();
2901 MMI->setDebugInfoAvailability(true);
2903 // Create DIEs for each of the externally visible global variables.
2904 ConstructGlobalVariableDIEs();
2906 // Create DIEs for each of the externally visible subprograms.
2907 ConstructSubprograms();
2909 // Prime section data.
2910 SectionMap.insert(TAI->getTextSection());
2912 // Print out .file directives to specify files for .loc directives. These
2913 // are printed out early so that they precede any .loc directives.
2914 if (TAI->hasDotLocAndDotFile()) {
2915 for (unsigned i = 1, e = SrcFiles.size(); i <= e; ++i) {
2916 sys::Path FullPath(Directories[SrcFiles[i].getDirectoryID()]);
2917 bool AppendOk = FullPath.appendComponent(SrcFiles[i].getName());
2918 assert(AppendOk && "Could not append filename to directory!");
2920 Asm->EmitFile(i, FullPath.toString());
2925 // Emit initial sections
2929 /// BeginModule - Emit all Dwarf sections that should come prior to the
2931 void BeginModule(Module *M) {
2935 /// EndModule - Emit all Dwarf sections that should come after the content.
2938 if (!ShouldEmitDwarf()) return;
2940 // Standard sections final addresses.
2941 Asm->SwitchToSection(TAI->getTextSection());
2942 EmitLabel("text_end", 0);
2943 Asm->SwitchToSection(TAI->getDataSection());
2944 EmitLabel("data_end", 0);
2946 // End text sections.
2947 for (unsigned i = 1, N = SectionMap.size(); i <= N; ++i) {
2948 Asm->SwitchToSection(SectionMap[i]);
2949 EmitLabel("section_end", i);
2952 // Emit common frame information.
2953 EmitCommonDebugFrame();
2955 // Emit function debug frame information
2956 for (std::vector<FunctionDebugFrameInfo>::iterator I = DebugFrames.begin(),
2957 E = DebugFrames.end(); I != E; ++I)
2958 EmitFunctionDebugFrame(*I);
2960 // Compute DIE offsets and sizes.
2963 // Emit all the DIEs into a debug info section
2966 // Corresponding abbreviations into a abbrev section.
2967 EmitAbbreviations();
2969 // Emit source line correspondence into a debug line section.
2972 // Emit info into a debug pubnames section.
2973 EmitDebugPubNames();
2975 // Emit info into a debug str section.
2978 // Emit info into a debug loc section.
2981 // Emit info into a debug aranges section.
2984 // Emit info into a debug ranges section.
2987 // Emit info into a debug macinfo section.
2991 /// BeginFunction - Gather pre-function debug information. Assumes being
2992 /// emitted immediately after the function entry point.
2993 void BeginFunction(MachineFunction *MF) {
2996 if (!ShouldEmitDwarf()) return;
2998 // Begin accumulating function debug information.
2999 MMI->BeginFunction(MF);
3001 // Assumes in correct section after the entry point.
3002 EmitLabel("func_begin", ++SubprogramCount);
3004 // Emit label for the implicitly defined dbg.stoppoint at the start of
3006 if (!Lines.empty()) {
3007 const SrcLineInfo &LineInfo = Lines[0];
3008 Asm->printLabel(LineInfo.getLabelID());
3012 /// EndFunction - Gather and emit post-function debug information.
3014 void EndFunction(MachineFunction *MF) {
3015 if (!ShouldEmitDwarf()) return;
3017 // Define end label for subprogram.
3018 EmitLabel("func_end", SubprogramCount);
3020 // Get function line info.
3021 if (!Lines.empty()) {
3022 // Get section line info.
3023 unsigned ID = SectionMap.insert(Asm->CurrentSection_);
3024 if (SectionSourceLines.size() < ID) SectionSourceLines.resize(ID);
3025 std::vector<SrcLineInfo> &SectionLineInfos = SectionSourceLines[ID-1];
3026 // Append the function info to section info.
3027 SectionLineInfos.insert(SectionLineInfos.end(),
3028 Lines.begin(), Lines.end());
3031 // Construct scopes for subprogram.
3033 ConstructRootDbgScope(RootDbgScope);
3035 // FIXME: This is wrong. We are essentially getting past a problem with
3036 // debug information not being able to handle unreachable blocks that have
3037 // debug information in them. In particular, those unreachable blocks that
3038 // have "region end" info in them. That situation results in the "root
3039 // scope" not being created. If that's the case, then emit a "default"
3040 // scope, i.e., one that encompasses the whole function. This isn't
3041 // desirable. And a better way of handling this (and all of the debugging
3042 // information) needs to be explored.
3043 ConstructDefaultDbgScope(MF);
3045 DebugFrames.push_back(FunctionDebugFrameInfo(SubprogramCount,
3046 MMI->getFrameMoves()));
3050 delete RootDbgScope;
3051 DbgScopeMap.clear();
3052 RootDbgScope = NULL;
3059 /// RecordSourceLine - Records location information and associates it with a
3060 /// label. Returns a unique label ID used to generate a label and provide
3061 /// correspondence to the source line list.
3062 unsigned RecordSourceLine(Value *V, unsigned Line, unsigned Col) {
3063 CompileUnit *Unit = DW_CUs[V];
3064 assert (Unit && "Unable to find CompileUnit");
3065 unsigned ID = MMI->NextLabelID();
3066 Lines.push_back(SrcLineInfo(Line, Col, Unit->getID(), ID));
3070 /// RecordSourceLine - Records location information and associates it with a
3071 /// label. Returns a unique label ID used to generate a label and provide
3072 /// correspondence to the source line list.
3073 unsigned RecordSourceLine(unsigned Line, unsigned Col, unsigned Src) {
3074 unsigned ID = MMI->NextLabelID();
3075 Lines.push_back(SrcLineInfo(Line, Col, Src, ID));
3079 unsigned getRecordSourceLineCount() {
3080 return Lines.size();
3083 /// RecordSource - Register a source file with debug info. Returns an source
3085 unsigned RecordSource(const std::string &Directory,
3086 const std::string &File) {
3087 unsigned DID = Directories.insert(Directory);
3088 return SrcFiles.insert(SrcFileInfo(DID,File));
3091 /// RecordRegionStart - Indicate the start of a region.
3093 unsigned RecordRegionStart(GlobalVariable *V) {
3094 DbgScope *Scope = getOrCreateScope(V);
3095 unsigned ID = MMI->NextLabelID();
3096 if (!Scope->getStartLabelID()) Scope->setStartLabelID(ID);
3100 /// RecordRegionEnd - Indicate the end of a region.
3102 unsigned RecordRegionEnd(GlobalVariable *V) {
3103 DbgScope *Scope = getOrCreateScope(V);
3104 unsigned ID = MMI->NextLabelID();
3105 Scope->setEndLabelID(ID);
3109 /// RecordVariable - Indicate the declaration of a local variable.
3111 void RecordVariable(GlobalVariable *GV, unsigned FrameIndex) {
3112 DIDescriptor Desc(GV);
3113 DbgScope *Scope = NULL;
3114 if (Desc.getTag() == DW_TAG_variable) {
3115 // GV is a global variable.
3116 DIGlobalVariable DG(GV);
3117 Scope = getOrCreateScope(DG.getContext().getGV());
3119 // or GV is a local variable.
3121 Scope = getOrCreateScope(DV.getContext().getGV());
3123 assert (Scope && "Unable to find variable' scope");
3124 DIVariable *VD = new DIVariable(GV);
3125 DbgVariable *DV = new DbgVariable(VD, FrameIndex);
3126 Scope->AddVariable(DV);
3130 //===----------------------------------------------------------------------===//
3131 /// DwarfException - Emits Dwarf exception handling directives.
3133 class DwarfException : public Dwarf {
3136 struct FunctionEHFrameInfo {
3139 unsigned PersonalityIndex;
3141 bool hasLandingPads;
3142 std::vector<MachineMove> Moves;
3143 const Function * function;
3145 FunctionEHFrameInfo(const std::string &FN, unsigned Num, unsigned P,
3147 const std::vector<MachineMove> &M,
3149 FnName(FN), Number(Num), PersonalityIndex(P),
3150 hasCalls(hC), hasLandingPads(hL), Moves(M), function (f) { }
3153 std::vector<FunctionEHFrameInfo> EHFrames;
3155 /// shouldEmitTable - Per-function flag to indicate if EH tables should
3157 bool shouldEmitTable;
3159 /// shouldEmitMoves - Per-function flag to indicate if frame moves info
3160 /// should be emitted.
3161 bool shouldEmitMoves;
3163 /// shouldEmitTableModule - Per-module flag to indicate if EH tables
3164 /// should be emitted.
3165 bool shouldEmitTableModule;
3167 /// shouldEmitFrameModule - Per-module flag to indicate if frame moves
3168 /// should be emitted.
3169 bool shouldEmitMovesModule;
3171 /// EmitCommonEHFrame - Emit the common eh unwind frame.
3173 void EmitCommonEHFrame(const Function *Personality, unsigned Index) {
3174 // Size and sign of stack growth.
3176 Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
3177 TargetFrameInfo::StackGrowsUp ?
3178 TD->getPointerSize() : -TD->getPointerSize();
3180 // Begin eh frame section.
3181 Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
3183 if (!TAI->doesRequireNonLocalEHFrameLabel())
3184 O << TAI->getEHGlobalPrefix();
3185 O << "EH_frame" << Index << ":\n";
3186 EmitLabel("section_eh_frame", Index);
3188 // Define base labels.
3189 EmitLabel("eh_frame_common", Index);
3191 // Define the eh frame length.
3192 EmitDifference("eh_frame_common_end", Index,
3193 "eh_frame_common_begin", Index, true);
3194 Asm->EOL("Length of Common Information Entry");
3197 EmitLabel("eh_frame_common_begin", Index);
3198 Asm->EmitInt32((int)0);
3199 Asm->EOL("CIE Identifier Tag");
3200 Asm->EmitInt8(DW_CIE_VERSION);
3201 Asm->EOL("CIE Version");
3203 // The personality presence indicates that language specific information
3204 // will show up in the eh frame.
3205 Asm->EmitString(Personality ? "zPLR" : "zR");
3206 Asm->EOL("CIE Augmentation");
3208 // Round out reader.
3209 Asm->EmitULEB128Bytes(1);
3210 Asm->EOL("CIE Code Alignment Factor");
3211 Asm->EmitSLEB128Bytes(stackGrowth);
3212 Asm->EOL("CIE Data Alignment Factor");
3213 Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), true));
3214 Asm->EOL("CIE Return Address Column");
3216 // If there is a personality, we need to indicate the functions location.
3218 Asm->EmitULEB128Bytes(7);
3219 Asm->EOL("Augmentation Size");
3221 if (TAI->getNeedsIndirectEncoding()) {
3222 Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4 | DW_EH_PE_indirect);
3223 Asm->EOL("Personality (pcrel sdata4 indirect)");
3225 Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
3226 Asm->EOL("Personality (pcrel sdata4)");
3229 PrintRelDirective(true);
3230 O << TAI->getPersonalityPrefix();
3231 Asm->EmitExternalGlobal((const GlobalVariable *)(Personality));
3232 O << TAI->getPersonalitySuffix();
3233 if (strcmp(TAI->getPersonalitySuffix(), "+4@GOTPCREL"))
3234 O << "-" << TAI->getPCSymbol();
3235 Asm->EOL("Personality");
3237 Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
3238 Asm->EOL("LSDA Encoding (pcrel sdata4)");
3240 Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
3241 Asm->EOL("FDE Encoding (pcrel sdata4)");
3243 Asm->EmitULEB128Bytes(1);
3244 Asm->EOL("Augmentation Size");
3246 Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
3247 Asm->EOL("FDE Encoding (pcrel sdata4)");
3250 // Indicate locations of general callee saved registers in frame.
3251 std::vector<MachineMove> Moves;
3252 RI->getInitialFrameState(Moves);
3253 EmitFrameMoves(NULL, 0, Moves, true);
3255 // On Darwin the linker honors the alignment of eh_frame, which means it
3256 // must be 8-byte on 64-bit targets to match what gcc does. Otherwise
3257 // you get holes which confuse readers of eh_frame.
3258 Asm->EmitAlignment(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3,
3260 EmitLabel("eh_frame_common_end", Index);
3265 /// EmitEHFrame - Emit function exception frame information.
3267 void EmitEHFrame(const FunctionEHFrameInfo &EHFrameInfo) {
3268 Function::LinkageTypes linkage = EHFrameInfo.function->getLinkage();
3270 Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
3272 // Externally visible entry into the functions eh frame info.
3273 // If the corresponding function is static, this should not be
3274 // externally visible.
3275 if (linkage != Function::InternalLinkage) {
3276 if (const char *GlobalEHDirective = TAI->getGlobalEHDirective())
3277 O << GlobalEHDirective << EHFrameInfo.FnName << "\n";
3280 // If corresponding function is weak definition, this should be too.
3281 if ((linkage == Function::WeakLinkage ||
3282 linkage == Function::LinkOnceLinkage) &&
3283 TAI->getWeakDefDirective())
3284 O << TAI->getWeakDefDirective() << EHFrameInfo.FnName << "\n";
3286 // If there are no calls then you can't unwind. This may mean we can
3287 // omit the EH Frame, but some environments do not handle weak absolute
3289 // If UnwindTablesMandatory is set we cannot do this optimization; the
3290 // unwind info is to be available for non-EH uses.
3291 if (!EHFrameInfo.hasCalls &&
3292 !UnwindTablesMandatory &&
3293 ((linkage != Function::WeakLinkage &&
3294 linkage != Function::LinkOnceLinkage) ||
3295 !TAI->getWeakDefDirective() ||
3296 TAI->getSupportsWeakOmittedEHFrame()))
3298 O << EHFrameInfo.FnName << " = 0\n";
3299 // This name has no connection to the function, so it might get
3300 // dead-stripped when the function is not, erroneously. Prohibit
3301 // dead-stripping unconditionally.
3302 if (const char *UsedDirective = TAI->getUsedDirective())
3303 O << UsedDirective << EHFrameInfo.FnName << "\n\n";
3305 O << EHFrameInfo.FnName << ":\n";
3308 EmitDifference("eh_frame_end", EHFrameInfo.Number,
3309 "eh_frame_begin", EHFrameInfo.Number, true);
3310 Asm->EOL("Length of Frame Information Entry");
3312 EmitLabel("eh_frame_begin", EHFrameInfo.Number);
3314 if (TAI->doesRequireNonLocalEHFrameLabel()) {
3315 PrintRelDirective(true, true);
3316 PrintLabelName("eh_frame_begin", EHFrameInfo.Number);
3318 if (!TAI->isAbsoluteEHSectionOffsets())
3319 O << "-EH_frame" << EHFrameInfo.PersonalityIndex;
3321 EmitSectionOffset("eh_frame_begin", "eh_frame_common",
3322 EHFrameInfo.Number, EHFrameInfo.PersonalityIndex,
3326 Asm->EOL("FDE CIE offset");
3328 EmitReference("eh_func_begin", EHFrameInfo.Number, true, true);
3329 Asm->EOL("FDE initial location");
3330 EmitDifference("eh_func_end", EHFrameInfo.Number,
3331 "eh_func_begin", EHFrameInfo.Number, true);
3332 Asm->EOL("FDE address range");
3334 // If there is a personality and landing pads then point to the language
3335 // specific data area in the exception table.
3336 if (EHFrameInfo.PersonalityIndex) {
3337 Asm->EmitULEB128Bytes(4);
3338 Asm->EOL("Augmentation size");
3340 if (EHFrameInfo.hasLandingPads)
3341 EmitReference("exception", EHFrameInfo.Number, true, true);
3343 Asm->EmitInt32((int)0);
3344 Asm->EOL("Language Specific Data Area");
3346 Asm->EmitULEB128Bytes(0);
3347 Asm->EOL("Augmentation size");
3350 // Indicate locations of function specific callee saved registers in
3352 EmitFrameMoves("eh_func_begin", EHFrameInfo.Number, EHFrameInfo.Moves, true);
3354 // On Darwin the linker honors the alignment of eh_frame, which means it
3355 // must be 8-byte on 64-bit targets to match what gcc does. Otherwise
3356 // you get holes which confuse readers of eh_frame.
3357 Asm->EmitAlignment(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3,
3359 EmitLabel("eh_frame_end", EHFrameInfo.Number);
3361 // If the function is marked used, this table should be also. We cannot
3362 // make the mark unconditional in this case, since retaining the table
3363 // also retains the function in this case, and there is code around
3364 // that depends on unused functions (calling undefined externals) being
3365 // dead-stripped to link correctly. Yes, there really is.
3366 if (MMI->getUsedFunctions().count(EHFrameInfo.function))
3367 if (const char *UsedDirective = TAI->getUsedDirective())
3368 O << UsedDirective << EHFrameInfo.FnName << "\n\n";
3372 /// EmitExceptionTable - Emit landing pads and actions.
3374 /// The general organization of the table is complex, but the basic concepts
3375 /// are easy. First there is a header which describes the location and
3376 /// organization of the three components that follow.
3377 /// 1. The landing pad site information describes the range of code covered
3378 /// by the try. In our case it's an accumulation of the ranges covered
3379 /// by the invokes in the try. There is also a reference to the landing
3380 /// pad that handles the exception once processed. Finally an index into
3381 /// the actions table.
3382 /// 2. The action table, in our case, is composed of pairs of type ids
3383 /// and next action offset. Starting with the action index from the
3384 /// landing pad site, each type Id is checked for a match to the current
3385 /// exception. If it matches then the exception and type id are passed
3386 /// on to the landing pad. Otherwise the next action is looked up. This
3387 /// chain is terminated with a next action of zero. If no type id is
3388 /// found the the frame is unwound and handling continues.
3389 /// 3. Type id table contains references to all the C++ typeinfo for all
3390 /// catches in the function. This tables is reversed indexed base 1.
3392 /// SharedTypeIds - How many leading type ids two landing pads have in common.
3393 static unsigned SharedTypeIds(const LandingPadInfo *L,
3394 const LandingPadInfo *R) {
3395 const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds;
3396 unsigned LSize = LIds.size(), RSize = RIds.size();
3397 unsigned MinSize = LSize < RSize ? LSize : RSize;
3400 for (; Count != MinSize; ++Count)
3401 if (LIds[Count] != RIds[Count])
3407 /// PadLT - Order landing pads lexicographically by type id.
3408 static bool PadLT(const LandingPadInfo *L, const LandingPadInfo *R) {
3409 const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds;
3410 unsigned LSize = LIds.size(), RSize = RIds.size();
3411 unsigned MinSize = LSize < RSize ? LSize : RSize;
3413 for (unsigned i = 0; i != MinSize; ++i)
3414 if (LIds[i] != RIds[i])
3415 return LIds[i] < RIds[i];
3417 return LSize < RSize;
3421 static inline unsigned getEmptyKey() { return -1U; }
3422 static inline unsigned getTombstoneKey() { return -2U; }
3423 static unsigned getHashValue(const unsigned &Key) { return Key; }
3424 static bool isEqual(unsigned LHS, unsigned RHS) { return LHS == RHS; }
3425 static bool isPod() { return true; }
3428 /// ActionEntry - Structure describing an entry in the actions table.
3429 struct ActionEntry {
3430 int ValueForTypeID; // The value to write - may not be equal to the type id.
3432 struct ActionEntry *Previous;
3435 /// PadRange - Structure holding a try-range and the associated landing pad.
3437 // The index of the landing pad.
3439 // The index of the begin and end labels in the landing pad's label lists.
3440 unsigned RangeIndex;
3443 typedef DenseMap<unsigned, PadRange, KeyInfo> RangeMapType;
3445 /// CallSiteEntry - Structure describing an entry in the call-site table.
3446 struct CallSiteEntry {
3447 // The 'try-range' is BeginLabel .. EndLabel.
3448 unsigned BeginLabel; // zero indicates the start of the function.
3449 unsigned EndLabel; // zero indicates the end of the function.
3450 // The landing pad starts at PadLabel.
3451 unsigned PadLabel; // zero indicates that there is no landing pad.
3455 void EmitExceptionTable() {
3456 const std::vector<GlobalVariable *> &TypeInfos = MMI->getTypeInfos();
3457 const std::vector<unsigned> &FilterIds = MMI->getFilterIds();
3458 const std::vector<LandingPadInfo> &PadInfos = MMI->getLandingPads();
3459 if (PadInfos.empty()) return;
3461 // Sort the landing pads in order of their type ids. This is used to fold
3462 // duplicate actions.
3463 SmallVector<const LandingPadInfo *, 64> LandingPads;
3464 LandingPads.reserve(PadInfos.size());
3465 for (unsigned i = 0, N = PadInfos.size(); i != N; ++i)
3466 LandingPads.push_back(&PadInfos[i]);
3467 std::sort(LandingPads.begin(), LandingPads.end(), PadLT);
3469 // Negative type ids index into FilterIds, positive type ids index into
3470 // TypeInfos. The value written for a positive type id is just the type
3471 // id itself. For a negative type id, however, the value written is the
3472 // (negative) byte offset of the corresponding FilterIds entry. The byte
3473 // offset is usually equal to the type id, because the FilterIds entries
3474 // are written using a variable width encoding which outputs one byte per
3475 // entry as long as the value written is not too large, but can differ.
3476 // This kind of complication does not occur for positive type ids because
3477 // type infos are output using a fixed width encoding.
3478 // FilterOffsets[i] holds the byte offset corresponding to FilterIds[i].
3479 SmallVector<int, 16> FilterOffsets;
3480 FilterOffsets.reserve(FilterIds.size());
3482 for(std::vector<unsigned>::const_iterator I = FilterIds.begin(),
3483 E = FilterIds.end(); I != E; ++I) {
3484 FilterOffsets.push_back(Offset);
3485 Offset -= TargetAsmInfo::getULEB128Size(*I);
3488 // Compute the actions table and gather the first action index for each
3489 // landing pad site.
3490 SmallVector<ActionEntry, 32> Actions;
3491 SmallVector<unsigned, 64> FirstActions;
3492 FirstActions.reserve(LandingPads.size());
3494 int FirstAction = 0;
3495 unsigned SizeActions = 0;
3496 for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
3497 const LandingPadInfo *LP = LandingPads[i];
3498 const std::vector<int> &TypeIds = LP->TypeIds;
3499 const unsigned NumShared = i ? SharedTypeIds(LP, LandingPads[i-1]) : 0;
3500 unsigned SizeSiteActions = 0;
3502 if (NumShared < TypeIds.size()) {
3503 unsigned SizeAction = 0;
3504 ActionEntry *PrevAction = 0;
3507 const unsigned SizePrevIds = LandingPads[i-1]->TypeIds.size();
3508 assert(Actions.size());
3509 PrevAction = &Actions.back();
3510 SizeAction = TargetAsmInfo::getSLEB128Size(PrevAction->NextAction) +
3511 TargetAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
3512 for (unsigned j = NumShared; j != SizePrevIds; ++j) {
3514 TargetAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
3515 SizeAction += -PrevAction->NextAction;
3516 PrevAction = PrevAction->Previous;
3520 // Compute the actions.
3521 for (unsigned I = NumShared, M = TypeIds.size(); I != M; ++I) {
3522 int TypeID = TypeIds[I];
3523 assert(-1-TypeID < (int)FilterOffsets.size() && "Unknown filter id!");
3524 int ValueForTypeID = TypeID < 0 ? FilterOffsets[-1 - TypeID] : TypeID;
3525 unsigned SizeTypeID = TargetAsmInfo::getSLEB128Size(ValueForTypeID);
3527 int NextAction = SizeAction ? -(SizeAction + SizeTypeID) : 0;
3528 SizeAction = SizeTypeID + TargetAsmInfo::getSLEB128Size(NextAction);
3529 SizeSiteActions += SizeAction;
3531 ActionEntry Action = {ValueForTypeID, NextAction, PrevAction};
3532 Actions.push_back(Action);
3534 PrevAction = &Actions.back();
3537 // Record the first action of the landing pad site.
3538 FirstAction = SizeActions + SizeSiteActions - SizeAction + 1;
3539 } // else identical - re-use previous FirstAction
3541 FirstActions.push_back(FirstAction);
3543 // Compute this sites contribution to size.
3544 SizeActions += SizeSiteActions;
3547 // Compute the call-site table. The entry for an invoke has a try-range
3548 // containing the call, a non-zero landing pad and an appropriate action.
3549 // The entry for an ordinary call has a try-range containing the call and
3550 // zero for the landing pad and the action. Calls marked 'nounwind' have
3551 // no entry and must not be contained in the try-range of any entry - they
3552 // form gaps in the table. Entries must be ordered by try-range address.
3553 SmallVector<CallSiteEntry, 64> CallSites;
3555 RangeMapType PadMap;
3556 // Invokes and nounwind calls have entries in PadMap (due to being bracketed
3557 // by try-range labels when lowered). Ordinary calls do not, so appropriate
3558 // try-ranges for them need be deduced.
3559 for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
3560 const LandingPadInfo *LandingPad = LandingPads[i];
3561 for (unsigned j = 0, E = LandingPad->BeginLabels.size(); j != E; ++j) {
3562 unsigned BeginLabel = LandingPad->BeginLabels[j];
3563 assert(!PadMap.count(BeginLabel) && "Duplicate landing pad labels!");
3564 PadRange P = { i, j };
3565 PadMap[BeginLabel] = P;
3569 // The end label of the previous invoke or nounwind try-range.
3570 unsigned LastLabel = 0;
3572 // Whether there is a potentially throwing instruction (currently this means
3573 // an ordinary call) between the end of the previous try-range and now.
3574 bool SawPotentiallyThrowing = false;
3576 // Whether the last callsite entry was for an invoke.
3577 bool PreviousIsInvoke = false;
3579 // Visit all instructions in order of address.
3580 for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
3582 for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end();
3584 if (!MI->isLabel()) {
3585 SawPotentiallyThrowing |= MI->getDesc().isCall();
3589 unsigned BeginLabel = MI->getOperand(0).getImm();
3590 assert(BeginLabel && "Invalid label!");
3592 // End of the previous try-range?
3593 if (BeginLabel == LastLabel)
3594 SawPotentiallyThrowing = false;
3596 // Beginning of a new try-range?
3597 RangeMapType::iterator L = PadMap.find(BeginLabel);
3598 if (L == PadMap.end())
3599 // Nope, it was just some random label.
3602 PadRange P = L->second;
3603 const LandingPadInfo *LandingPad = LandingPads[P.PadIndex];
3605 assert(BeginLabel == LandingPad->BeginLabels[P.RangeIndex] &&
3606 "Inconsistent landing pad map!");
3608 // If some instruction between the previous try-range and this one may
3609 // throw, create a call-site entry with no landing pad for the region
3610 // between the try-ranges.
3611 if (SawPotentiallyThrowing) {
3612 CallSiteEntry Site = {LastLabel, BeginLabel, 0, 0};
3613 CallSites.push_back(Site);
3614 PreviousIsInvoke = false;
3617 LastLabel = LandingPad->EndLabels[P.RangeIndex];
3618 assert(BeginLabel && LastLabel && "Invalid landing pad!");
3620 if (LandingPad->LandingPadLabel) {
3621 // This try-range is for an invoke.
3622 CallSiteEntry Site = {BeginLabel, LastLabel,
3623 LandingPad->LandingPadLabel, FirstActions[P.PadIndex]};
3625 // Try to merge with the previous call-site.
3626 if (PreviousIsInvoke) {
3627 CallSiteEntry &Prev = CallSites.back();
3628 if (Site.PadLabel == Prev.PadLabel && Site.Action == Prev.Action) {
3629 // Extend the range of the previous entry.
3630 Prev.EndLabel = Site.EndLabel;
3635 // Otherwise, create a new call-site.
3636 CallSites.push_back(Site);
3637 PreviousIsInvoke = true;
3640 PreviousIsInvoke = false;
3644 // If some instruction between the previous try-range and the end of the
3645 // function may throw, create a call-site entry with no landing pad for the
3646 // region following the try-range.
3647 if (SawPotentiallyThrowing) {
3648 CallSiteEntry Site = {LastLabel, 0, 0, 0};
3649 CallSites.push_back(Site);
3655 const unsigned SiteStartSize = sizeof(int32_t); // DW_EH_PE_udata4
3656 const unsigned SiteLengthSize = sizeof(int32_t); // DW_EH_PE_udata4
3657 const unsigned LandingPadSize = sizeof(int32_t); // DW_EH_PE_udata4
3658 unsigned SizeSites = CallSites.size() * (SiteStartSize +
3661 for (unsigned i = 0, e = CallSites.size(); i < e; ++i)
3662 SizeSites += TargetAsmInfo::getULEB128Size(CallSites[i].Action);
3665 const unsigned TypeInfoSize = TD->getPointerSize(); // DW_EH_PE_absptr
3666 unsigned SizeTypes = TypeInfos.size() * TypeInfoSize;
3668 unsigned TypeOffset = sizeof(int8_t) + // Call site format
3669 TargetAsmInfo::getULEB128Size(SizeSites) + // Call-site table length
3670 SizeSites + SizeActions + SizeTypes;
3672 unsigned TotalSize = sizeof(int8_t) + // LPStart format
3673 sizeof(int8_t) + // TType format
3674 TargetAsmInfo::getULEB128Size(TypeOffset) + // TType base offset
3677 unsigned SizeAlign = (4 - TotalSize) & 3;
3679 // Begin the exception table.
3680 Asm->SwitchToDataSection(TAI->getDwarfExceptionSection());
3681 Asm->EmitAlignment(2, 0, 0, false);
3682 O << "GCC_except_table" << SubprogramCount << ":\n";
3683 for (unsigned i = 0; i != SizeAlign; ++i) {
3685 Asm->EOL("Padding");
3687 EmitLabel("exception", SubprogramCount);
3690 Asm->EmitInt8(DW_EH_PE_omit);
3691 Asm->EOL("LPStart format (DW_EH_PE_omit)");
3692 Asm->EmitInt8(DW_EH_PE_absptr);
3693 Asm->EOL("TType format (DW_EH_PE_absptr)");
3694 Asm->EmitULEB128Bytes(TypeOffset);
3695 Asm->EOL("TType base offset");
3696 Asm->EmitInt8(DW_EH_PE_udata4);
3697 Asm->EOL("Call site format (DW_EH_PE_udata4)");
3698 Asm->EmitULEB128Bytes(SizeSites);
3699 Asm->EOL("Call-site table length");
3701 // Emit the landing pad site information.
3702 for (unsigned i = 0; i < CallSites.size(); ++i) {
3703 CallSiteEntry &S = CallSites[i];
3704 const char *BeginTag;
3705 unsigned BeginNumber;
3707 if (!S.BeginLabel) {
3708 BeginTag = "eh_func_begin";
3709 BeginNumber = SubprogramCount;
3712 BeginNumber = S.BeginLabel;
3715 EmitSectionOffset(BeginTag, "eh_func_begin", BeginNumber, SubprogramCount,
3717 Asm->EOL("Region start");
3720 EmitDifference("eh_func_end", SubprogramCount, BeginTag, BeginNumber,
3723 EmitDifference("label", S.EndLabel, BeginTag, BeginNumber, true);
3725 Asm->EOL("Region length");
3730 EmitSectionOffset("label", "eh_func_begin", S.PadLabel, SubprogramCount,
3732 Asm->EOL("Landing pad");
3734 Asm->EmitULEB128Bytes(S.Action);
3738 // Emit the actions.
3739 for (unsigned I = 0, N = Actions.size(); I != N; ++I) {
3740 ActionEntry &Action = Actions[I];
3742 Asm->EmitSLEB128Bytes(Action.ValueForTypeID);
3743 Asm->EOL("TypeInfo index");
3744 Asm->EmitSLEB128Bytes(Action.NextAction);
3745 Asm->EOL("Next action");
3748 // Emit the type ids.
3749 for (unsigned M = TypeInfos.size(); M; --M) {
3750 GlobalVariable *GV = TypeInfos[M - 1];
3752 PrintRelDirective();
3755 O << Asm->getGlobalLinkName(GV);
3759 Asm->EOL("TypeInfo");
3762 // Emit the filter typeids.
3763 for (unsigned j = 0, M = FilterIds.size(); j < M; ++j) {
3764 unsigned TypeID = FilterIds[j];
3765 Asm->EmitULEB128Bytes(TypeID);
3766 Asm->EOL("Filter TypeInfo index");
3769 Asm->EmitAlignment(2, 0, 0, false);
3773 //===--------------------------------------------------------------------===//
3774 // Main entry points.
3776 DwarfException(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
3777 : Dwarf(OS, A, T, "eh")
3778 , shouldEmitTable(false)
3779 , shouldEmitMoves(false)
3780 , shouldEmitTableModule(false)
3781 , shouldEmitMovesModule(false)
3784 virtual ~DwarfException() {}
3786 /// SetModuleInfo - Set machine module information when it's known that pass
3787 /// manager has created it. Set by the target AsmPrinter.
3788 void SetModuleInfo(MachineModuleInfo *mmi) {
3792 /// BeginModule - Emit all exception information that should come prior to the
3794 void BeginModule(Module *M) {
3798 /// EndModule - Emit all exception information that should come after the
3801 if (shouldEmitMovesModule || shouldEmitTableModule) {
3802 const std::vector<Function *> Personalities = MMI->getPersonalities();
3803 for (unsigned i =0; i < Personalities.size(); ++i)
3804 EmitCommonEHFrame(Personalities[i], i);
3806 for (std::vector<FunctionEHFrameInfo>::iterator I = EHFrames.begin(),
3807 E = EHFrames.end(); I != E; ++I)
3812 /// BeginFunction - Gather pre-function exception information. Assumes being
3813 /// emitted immediately after the function entry point.
3814 void BeginFunction(MachineFunction *MF) {
3816 shouldEmitTable = shouldEmitMoves = false;
3817 if (MMI && TAI->doesSupportExceptionHandling()) {
3819 // Map all labels and get rid of any dead landing pads.
3820 MMI->TidyLandingPads();
3821 // If any landing pads survive, we need an EH table.
3822 if (MMI->getLandingPads().size())
3823 shouldEmitTable = true;
3825 // See if we need frame move info.
3826 if (!MF->getFunction()->doesNotThrow() || UnwindTablesMandatory)
3827 shouldEmitMoves = true;
3829 if (shouldEmitMoves || shouldEmitTable)
3830 // Assumes in correct section after the entry point.
3831 EmitLabel("eh_func_begin", ++SubprogramCount);
3833 shouldEmitTableModule |= shouldEmitTable;
3834 shouldEmitMovesModule |= shouldEmitMoves;
3837 /// EndFunction - Gather and emit post-function exception information.
3839 void EndFunction() {
3840 if (shouldEmitMoves || shouldEmitTable) {
3841 EmitLabel("eh_func_end", SubprogramCount);
3842 EmitExceptionTable();
3844 // Save EH frame information
3846 push_back(FunctionEHFrameInfo(getAsm()->getCurrentFunctionEHName(MF),
3848 MMI->getPersonalityIndex(),
3849 MF->getFrameInfo()->hasCalls(),
3850 !MMI->getLandingPads().empty(),
3851 MMI->getFrameMoves(),
3852 MF->getFunction()));
3857 } // End of namespace llvm
3859 //===----------------------------------------------------------------------===//
3861 /// Emit - Print the abbreviation using the specified Dwarf writer.
3863 void DIEAbbrev::Emit(const DwarfDebug &DD) const {
3864 // Emit its Dwarf tag type.
3865 DD.getAsm()->EmitULEB128Bytes(Tag);
3866 DD.getAsm()->EOL(TagString(Tag));
3868 // Emit whether it has children DIEs.
3869 DD.getAsm()->EmitULEB128Bytes(ChildrenFlag);
3870 DD.getAsm()->EOL(ChildrenString(ChildrenFlag));
3872 // For each attribute description.
3873 for (unsigned i = 0, N = Data.size(); i < N; ++i) {
3874 const DIEAbbrevData &AttrData = Data[i];
3876 // Emit attribute type.
3877 DD.getAsm()->EmitULEB128Bytes(AttrData.getAttribute());
3878 DD.getAsm()->EOL(AttributeString(AttrData.getAttribute()));
3881 DD.getAsm()->EmitULEB128Bytes(AttrData.getForm());
3882 DD.getAsm()->EOL(FormEncodingString(AttrData.getForm()));
3885 // Mark end of abbreviation.
3886 DD.getAsm()->EmitULEB128Bytes(0); DD.getAsm()->EOL("EOM(1)");
3887 DD.getAsm()->EmitULEB128Bytes(0); DD.getAsm()->EOL("EOM(2)");
3891 void DIEAbbrev::print(std::ostream &O) {
3892 O << "Abbreviation @"
3893 << std::hex << (intptr_t)this << std::dec
3897 << ChildrenString(ChildrenFlag)
3900 for (unsigned i = 0, N = Data.size(); i < N; ++i) {
3902 << AttributeString(Data[i].getAttribute())
3904 << FormEncodingString(Data[i].getForm())
3908 void DIEAbbrev::dump() { print(cerr); }
3911 //===----------------------------------------------------------------------===//
3914 void DIEValue::dump() {
3919 //===----------------------------------------------------------------------===//
3921 /// EmitValue - Emit integer of appropriate size.
3923 void DIEInteger::EmitValue(DwarfDebug &DD, unsigned Form) {
3925 case DW_FORM_flag: // Fall thru
3926 case DW_FORM_ref1: // Fall thru
3927 case DW_FORM_data1: DD.getAsm()->EmitInt8(Integer); break;
3928 case DW_FORM_ref2: // Fall thru
3929 case DW_FORM_data2: DD.getAsm()->EmitInt16(Integer); break;
3930 case DW_FORM_ref4: // Fall thru
3931 case DW_FORM_data4: DD.getAsm()->EmitInt32(Integer); break;
3932 case DW_FORM_ref8: // Fall thru
3933 case DW_FORM_data8: DD.getAsm()->EmitInt64(Integer); break;
3934 case DW_FORM_udata: DD.getAsm()->EmitULEB128Bytes(Integer); break;
3935 case DW_FORM_sdata: DD.getAsm()->EmitSLEB128Bytes(Integer); break;
3936 default: assert(0 && "DIE Value form not supported yet"); break;
3940 /// SizeOf - Determine size of integer value in bytes.
3942 unsigned DIEInteger::SizeOf(const DwarfDebug &DD, unsigned Form) const {
3944 case DW_FORM_flag: // Fall thru
3945 case DW_FORM_ref1: // Fall thru
3946 case DW_FORM_data1: return sizeof(int8_t);
3947 case DW_FORM_ref2: // Fall thru
3948 case DW_FORM_data2: return sizeof(int16_t);
3949 case DW_FORM_ref4: // Fall thru
3950 case DW_FORM_data4: return sizeof(int32_t);
3951 case DW_FORM_ref8: // Fall thru
3952 case DW_FORM_data8: return sizeof(int64_t);
3953 case DW_FORM_udata: return TargetAsmInfo::getULEB128Size(Integer);
3954 case DW_FORM_sdata: return TargetAsmInfo::getSLEB128Size(Integer);
3955 default: assert(0 && "DIE Value form not supported yet"); break;
3960 //===----------------------------------------------------------------------===//
3962 /// EmitValue - Emit string value.
3964 void DIEString::EmitValue(DwarfDebug &DD, unsigned Form) {
3965 DD.getAsm()->EmitString(String);
3968 //===----------------------------------------------------------------------===//
3970 /// EmitValue - Emit label value.
3972 void DIEDwarfLabel::EmitValue(DwarfDebug &DD, unsigned Form) {
3973 bool IsSmall = Form == DW_FORM_data4;
3974 DD.EmitReference(Label, false, IsSmall);
3977 /// SizeOf - Determine size of label value in bytes.
3979 unsigned DIEDwarfLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
3980 if (Form == DW_FORM_data4) return 4;
3981 return DD.getTargetData()->getPointerSize();
3984 //===----------------------------------------------------------------------===//
3986 /// EmitValue - Emit label value.
3988 void DIEObjectLabel::EmitValue(DwarfDebug &DD, unsigned Form) {
3989 bool IsSmall = Form == DW_FORM_data4;
3990 DD.EmitReference(Label, false, IsSmall);
3993 /// SizeOf - Determine size of label value in bytes.
3995 unsigned DIEObjectLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
3996 if (Form == DW_FORM_data4) return 4;
3997 return DD.getTargetData()->getPointerSize();
4000 //===----------------------------------------------------------------------===//
4002 /// EmitValue - Emit delta value.
4004 void DIESectionOffset::EmitValue(DwarfDebug &DD, unsigned Form) {
4005 bool IsSmall = Form == DW_FORM_data4;
4006 DD.EmitSectionOffset(Label.Tag, Section.Tag,
4007 Label.Number, Section.Number, IsSmall, IsEH, UseSet);
4010 /// SizeOf - Determine size of delta value in bytes.
4012 unsigned DIESectionOffset::SizeOf(const DwarfDebug &DD, unsigned Form) const {
4013 if (Form == DW_FORM_data4) return 4;
4014 return DD.getTargetData()->getPointerSize();
4017 //===----------------------------------------------------------------------===//
4019 /// EmitValue - Emit delta value.
4021 void DIEDelta::EmitValue(DwarfDebug &DD, unsigned Form) {
4022 bool IsSmall = Form == DW_FORM_data4;
4023 DD.EmitDifference(LabelHi, LabelLo, IsSmall);
4026 /// SizeOf - Determine size of delta value in bytes.
4028 unsigned DIEDelta::SizeOf(const DwarfDebug &DD, unsigned Form) const {
4029 if (Form == DW_FORM_data4) return 4;
4030 return DD.getTargetData()->getPointerSize();
4033 //===----------------------------------------------------------------------===//
4035 /// EmitValue - Emit debug information entry offset.
4037 void DIEntry::EmitValue(DwarfDebug &DD, unsigned Form) {
4038 DD.getAsm()->EmitInt32(Entry->getOffset());
4041 //===----------------------------------------------------------------------===//
4043 /// ComputeSize - calculate the size of the block.
4045 unsigned DIEBlock::ComputeSize(DwarfDebug &DD) {
4047 const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
4049 for (unsigned i = 0, N = Values.size(); i < N; ++i) {
4050 Size += Values[i]->SizeOf(DD, AbbrevData[i].getForm());
4056 /// EmitValue - Emit block data.
4058 void DIEBlock::EmitValue(DwarfDebug &DD, unsigned Form) {
4060 case DW_FORM_block1: DD.getAsm()->EmitInt8(Size); break;
4061 case DW_FORM_block2: DD.getAsm()->EmitInt16(Size); break;
4062 case DW_FORM_block4: DD.getAsm()->EmitInt32(Size); break;
4063 case DW_FORM_block: DD.getAsm()->EmitULEB128Bytes(Size); break;
4064 default: assert(0 && "Improper form for block"); break;
4067 const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
4069 for (unsigned i = 0, N = Values.size(); i < N; ++i) {
4071 Values[i]->EmitValue(DD, AbbrevData[i].getForm());
4075 /// SizeOf - Determine size of block data in bytes.
4077 unsigned DIEBlock::SizeOf(const DwarfDebug &DD, unsigned Form) const {
4079 case DW_FORM_block1: return Size + sizeof(int8_t);
4080 case DW_FORM_block2: return Size + sizeof(int16_t);
4081 case DW_FORM_block4: return Size + sizeof(int32_t);
4082 case DW_FORM_block: return Size + TargetAsmInfo::getULEB128Size(Size);
4083 default: assert(0 && "Improper form for block"); break;
4088 //===----------------------------------------------------------------------===//
4089 /// DIE Implementation
4092 for (unsigned i = 0, N = Children.size(); i < N; ++i)
4096 /// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
4098 void DIE::AddSiblingOffset() {
4099 DIEInteger *DI = new DIEInteger(0);
4100 Values.insert(Values.begin(), DI);
4101 Abbrev.AddFirstAttribute(DW_AT_sibling, DW_FORM_ref4);
4104 /// Profile - Used to gather unique data for the value folding set.
4106 void DIE::Profile(FoldingSetNodeID &ID) {
4109 for (unsigned i = 0, N = Children.size(); i < N; ++i)
4110 ID.AddPointer(Children[i]);
4112 for (unsigned j = 0, M = Values.size(); j < M; ++j)
4113 ID.AddPointer(Values[j]);
4117 void DIE::print(std::ostream &O, unsigned IncIndent) {
4118 static unsigned IndentCount = 0;
4119 IndentCount += IncIndent;
4120 const std::string Indent(IndentCount, ' ');
4121 bool isBlock = Abbrev.getTag() == 0;
4126 << "0x" << std::hex << (intptr_t)this << std::dec
4127 << ", Offset: " << Offset
4128 << ", Size: " << Size
4132 << TagString(Abbrev.getTag())
4134 << ChildrenString(Abbrev.getChildrenFlag());
4136 O << "Size: " << Size;
4140 const SmallVector<DIEAbbrevData, 8> &Data = Abbrev.getData();
4143 for (unsigned i = 0, N = Data.size(); i < N; ++i) {
4147 O << AttributeString(Data[i].getAttribute());
4149 O << "Blk[" << i << "]";
4152 << FormEncodingString(Data[i].getForm())
4154 Values[i]->print(O);
4159 for (unsigned j = 0, M = Children.size(); j < M; ++j) {
4160 Children[j]->print(O, 4);
4163 if (!isBlock) O << "\n";
4164 IndentCount -= IncIndent;
4172 //===----------------------------------------------------------------------===//
4173 /// DwarfWriter Implementation
4176 DwarfWriter::DwarfWriter() : ImmutablePass(&ID), DD(NULL), DE(NULL) {
4179 DwarfWriter::~DwarfWriter() {
4184 /// BeginModule - Emit all Dwarf sections that should come prior to the
4186 void DwarfWriter::BeginModule(Module *M,
4187 MachineModuleInfo *MMI,
4188 raw_ostream &OS, AsmPrinter *A,
4189 const TargetAsmInfo *T) {
4190 DE = new DwarfException(OS, A, T);
4191 DD = new DwarfDebug(OS, A, T);
4194 DD->SetDebugInfo(MMI);
4195 DE->SetModuleInfo(MMI);
4198 /// EndModule - Emit all Dwarf sections that should come after the content.
4200 void DwarfWriter::EndModule() {
4205 /// BeginFunction - Gather pre-function debug information. Assumes being
4206 /// emitted immediately after the function entry point.
4207 void DwarfWriter::BeginFunction(MachineFunction *MF) {
4208 DE->BeginFunction(MF);
4209 DD->BeginFunction(MF);
4212 /// EndFunction - Gather and emit post-function debug information.
4214 void DwarfWriter::EndFunction(MachineFunction *MF) {
4215 DD->EndFunction(MF);
4218 if (MachineModuleInfo *MMI = DD->getMMI() ? DD->getMMI() : DE->getMMI())
4219 // Clear function debug information.
4223 /// RecordSourceLine - Records location information and associates it with a
4224 /// label. Returns a unique label ID used to generate a label and provide
4225 /// correspondence to the source line list.
4226 unsigned DwarfWriter::RecordSourceLine(unsigned Line, unsigned Col,
4228 return DD->RecordSourceLine(Line, Col, Src);
4231 /// RecordSource - Register a source file with debug info. Returns an source
4233 unsigned DwarfWriter::RecordSource(const std::string &Dir,
4234 const std::string &File) {
4235 return DD->RecordSource(Dir, File);
4238 /// RecordRegionStart - Indicate the start of a region.
4239 unsigned DwarfWriter::RecordRegionStart(GlobalVariable *V) {
4240 return DD->RecordRegionStart(V);
4243 /// RecordRegionEnd - Indicate the end of a region.
4244 unsigned DwarfWriter::RecordRegionEnd(GlobalVariable *V) {
4245 return DD->RecordRegionEnd(V);
4248 /// getRecordSourceLineCount - Count source lines.
4249 unsigned DwarfWriter::getRecordSourceLineCount() {
4250 return DD->getRecordSourceLineCount();
4253 /// RecordVariable - Indicate the declaration of a local variable.
4255 void DwarfWriter::RecordVariable(GlobalVariable *GV, unsigned FrameIndex) {
4256 DD->RecordVariable(GV, FrameIndex);