1 //===-- llvm/CodeGen/DwarfWriter.cpp - Dwarf Framework ----------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by James M. Laskey and is distributed under the
6 // University of Illinois Open Source 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/FoldingSet.h"
17 #include "llvm/ADT/StringExtras.h"
18 #include "llvm/ADT/UniqueVector.h"
19 #include "llvm/Module.h"
20 #include "llvm/Type.h"
21 #include "llvm/CodeGen/AsmPrinter.h"
22 #include "llvm/CodeGen/MachineModuleInfo.h"
23 #include "llvm/CodeGen/MachineFrameInfo.h"
24 #include "llvm/CodeGen/MachineLocation.h"
25 #include "llvm/Support/Debug.h"
26 #include "llvm/Support/Dwarf.h"
27 #include "llvm/Support/CommandLine.h"
28 #include "llvm/Support/DataTypes.h"
29 #include "llvm/Support/Mangler.h"
30 #include "llvm/Target/TargetAsmInfo.h"
31 #include "llvm/Target/MRegisterInfo.h"
32 #include "llvm/Target/TargetData.h"
33 #include "llvm/Target/TargetFrameInfo.h"
34 #include "llvm/Target/TargetMachine.h"
35 #include "llvm/Target/TargetOptions.h"
39 using namespace llvm::dwarf;
43 //===----------------------------------------------------------------------===//
45 /// Configuration values for initial hash set sizes (log2).
47 static const unsigned InitDiesSetSize = 9; // 512
48 static const unsigned InitAbbreviationsSetSize = 9; // 512
49 static const unsigned InitValuesSetSize = 9; // 512
51 //===----------------------------------------------------------------------===//
52 /// Forward declarations.
57 //===----------------------------------------------------------------------===//
58 /// DWLabel - Labels are used to track locations in the assembler file.
59 /// Labels appear in the form <prefix><Tag><Number>, where the tag is a
60 /// category of label (Ex. location) and number is a value unique in that
64 /// Tag - Label category tag. Should always be a staticly declared C string.
68 /// Number - Value to make label unique.
72 DWLabel(const char *T, unsigned N) : Tag(T), Number(N) {}
74 void Profile(FoldingSetNodeID &ID) const {
75 ID.AddString(std::string(Tag));
76 ID.AddInteger(Number);
80 void print(std::ostream *O) const {
83 void print(std::ostream &O) const {
85 if (Number) O << Number;
90 //===----------------------------------------------------------------------===//
91 /// DIEAbbrevData - Dwarf abbreviation data, describes the one attribute of a
92 /// Dwarf abbreviation.
95 /// Attribute - Dwarf attribute code.
99 /// Form - Dwarf form code.
104 DIEAbbrevData(unsigned A, unsigned F)
110 unsigned getAttribute() const { return Attribute; }
111 unsigned getForm() const { return Form; }
113 /// Profile - Used to gather unique data for the abbreviation folding set.
115 void Profile(FoldingSetNodeID &ID)const {
116 ID.AddInteger(Attribute);
121 //===----------------------------------------------------------------------===//
122 /// DIEAbbrev - Dwarf abbreviation, describes the organization of a debug
123 /// information object.
124 class DIEAbbrev : public FoldingSetNode {
126 /// Tag - Dwarf tag code.
130 /// Unique number for node.
134 /// ChildrenFlag - Dwarf children flag.
136 unsigned ChildrenFlag;
138 /// Data - Raw data bytes for abbreviation.
140 std::vector<DIEAbbrevData> Data;
144 DIEAbbrev(unsigned T, unsigned C)
152 unsigned getTag() const { return Tag; }
153 unsigned getNumber() const { return Number; }
154 unsigned getChildrenFlag() const { return ChildrenFlag; }
155 const std::vector<DIEAbbrevData> &getData() const { return Data; }
156 void setTag(unsigned T) { Tag = T; }
157 void setChildrenFlag(unsigned CF) { ChildrenFlag = CF; }
158 void setNumber(unsigned N) { Number = N; }
160 /// AddAttribute - Adds another set of attribute information to the
162 void AddAttribute(unsigned Attribute, unsigned Form) {
163 Data.push_back(DIEAbbrevData(Attribute, Form));
166 /// AddFirstAttribute - Adds a set of attribute information to the front
167 /// of the abbreviation.
168 void AddFirstAttribute(unsigned Attribute, unsigned Form) {
169 Data.insert(Data.begin(), DIEAbbrevData(Attribute, Form));
172 /// Profile - Used to gather unique data for the abbreviation folding set.
174 void Profile(FoldingSetNodeID &ID) {
176 ID.AddInteger(ChildrenFlag);
178 // For each attribute description.
179 for (unsigned i = 0, N = Data.size(); i < N; ++i)
183 /// Emit - Print the abbreviation using the specified Dwarf writer.
185 void Emit(const DwarfDebug &DD) const;
188 void print(std::ostream *O) {
191 void print(std::ostream &O);
196 //===----------------------------------------------------------------------===//
197 /// DIE - A structured debug information entry. Has an abbreviation which
198 /// describes it's organization.
199 class DIE : public FoldingSetNode {
201 /// Abbrev - Buffer for constructing abbreviation.
205 /// Offset - Offset in debug info section.
209 /// Size - Size of instance + children.
215 std::vector<DIE *> Children;
217 /// Attributes values.
219 std::vector<DIEValue *> Values;
223 : Abbrev(Tag, DW_CHILDREN_no)
232 DIEAbbrev &getAbbrev() { return Abbrev; }
233 unsigned getAbbrevNumber() const {
234 return Abbrev.getNumber();
236 unsigned getTag() const { return Abbrev.getTag(); }
237 unsigned getOffset() const { return Offset; }
238 unsigned getSize() const { return Size; }
239 const std::vector<DIE *> &getChildren() const { return Children; }
240 const std::vector<DIEValue *> &getValues() const { return Values; }
241 void setTag(unsigned Tag) { Abbrev.setTag(Tag); }
242 void setOffset(unsigned O) { Offset = O; }
243 void setSize(unsigned S) { Size = S; }
245 /// AddValue - Add a value and attributes to a DIE.
247 void AddValue(unsigned Attribute, unsigned Form, DIEValue *Value) {
248 Abbrev.AddAttribute(Attribute, Form);
249 Values.push_back(Value);
252 /// SiblingOffset - Return the offset of the debug information entry's
254 unsigned SiblingOffset() const { return Offset + Size; }
256 /// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
258 void AddSiblingOffset();
260 /// AddChild - Add a child to the DIE.
262 void AddChild(DIE *Child) {
263 Abbrev.setChildrenFlag(DW_CHILDREN_yes);
264 Children.push_back(Child);
267 /// Detach - Detaches objects connected to it after copying.
273 /// Profile - Used to gather unique data for the value folding set.
275 void Profile(FoldingSetNodeID &ID) ;
278 void print(std::ostream *O, unsigned IncIndent = 0) {
279 if (O) print(*O, IncIndent);
281 void print(std::ostream &O, unsigned IncIndent = 0);
286 //===----------------------------------------------------------------------===//
287 /// DIEValue - A debug information entry value.
289 class DIEValue : public FoldingSetNode {
301 /// Type - Type of data stored in the value.
308 virtual ~DIEValue() {}
311 unsigned getType() const { return Type; }
313 // Implement isa/cast/dyncast.
314 static bool classof(const DIEValue *) { return true; }
316 /// EmitValue - Emit value via the Dwarf writer.
318 virtual void EmitValue(const DwarfDebug &DD, unsigned Form) const = 0;
320 /// SizeOf - Return the size of a value in bytes.
322 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const = 0;
324 /// Profile - Used to gather unique data for the value folding set.
326 virtual void Profile(FoldingSetNodeID &ID) = 0;
329 void print(std::ostream *O) {
332 virtual void print(std::ostream &O) = 0;
337 //===----------------------------------------------------------------------===//
338 /// DWInteger - An integer value DIE.
340 class DIEInteger : public DIEValue {
345 DIEInteger(uint64_t I) : DIEValue(isInteger), Integer(I) {}
347 // Implement isa/cast/dyncast.
348 static bool classof(const DIEInteger *) { return true; }
349 static bool classof(const DIEValue *I) { return I->Type == isInteger; }
351 /// BestForm - Choose the best form for integer.
353 static unsigned BestForm(bool IsSigned, uint64_t Integer) {
355 if ((char)Integer == (signed)Integer) return DW_FORM_data1;
356 if ((short)Integer == (signed)Integer) return DW_FORM_data2;
357 if ((int)Integer == (signed)Integer) return DW_FORM_data4;
359 if ((unsigned char)Integer == Integer) return DW_FORM_data1;
360 if ((unsigned short)Integer == Integer) return DW_FORM_data2;
361 if ((unsigned int)Integer == Integer) return DW_FORM_data4;
363 return DW_FORM_data8;
366 /// EmitValue - Emit integer of appropriate size.
368 virtual void EmitValue(const DwarfDebug &DD, unsigned Form) const;
370 /// SizeOf - Determine size of integer value in bytes.
372 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
374 /// Profile - Used to gather unique data for the value folding set.
376 static void Profile(FoldingSetNodeID &ID, unsigned Integer) {
377 ID.AddInteger(isInteger);
378 ID.AddInteger(Integer);
380 virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Integer); }
383 virtual void print(std::ostream &O) {
384 O << "Int: " << (int64_t)Integer
385 << " 0x" << std::hex << Integer << std::dec;
390 //===----------------------------------------------------------------------===//
391 /// DIEString - A string value DIE.
393 class DIEString : public DIEValue {
395 const std::string String;
397 DIEString(const std::string &S) : DIEValue(isString), String(S) {}
399 // Implement isa/cast/dyncast.
400 static bool classof(const DIEString *) { return true; }
401 static bool classof(const DIEValue *S) { return S->Type == isString; }
403 /// EmitValue - Emit string value.
405 virtual void EmitValue(const DwarfDebug &DD, unsigned Form) const;
407 /// SizeOf - Determine size of string value in bytes.
409 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const {
410 return String.size() + sizeof(char); // sizeof('\0');
413 /// Profile - Used to gather unique data for the value folding set.
415 static void Profile(FoldingSetNodeID &ID, const std::string &String) {
416 ID.AddInteger(isString);
417 ID.AddString(String);
419 virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, String); }
422 virtual void print(std::ostream &O) {
423 O << "Str: \"" << String << "\"";
428 //===----------------------------------------------------------------------===//
429 /// DIEDwarfLabel - A Dwarf internal label expression DIE.
431 class DIEDwarfLabel : public DIEValue {
436 DIEDwarfLabel(const DWLabel &L) : DIEValue(isLabel), Label(L) {}
438 // Implement isa/cast/dyncast.
439 static bool classof(const DIEDwarfLabel *) { return true; }
440 static bool classof(const DIEValue *L) { return L->Type == isLabel; }
442 /// EmitValue - Emit label value.
444 virtual void EmitValue(const DwarfDebug &DD, unsigned Form) const;
446 /// SizeOf - Determine size of label value in bytes.
448 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
450 /// Profile - Used to gather unique data for the value folding set.
452 static void Profile(FoldingSetNodeID &ID, const DWLabel &Label) {
453 ID.AddInteger(isLabel);
456 virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label); }
459 virtual void print(std::ostream &O) {
467 //===----------------------------------------------------------------------===//
468 /// DIEObjectLabel - A label to an object in code or data.
470 class DIEObjectLabel : public DIEValue {
472 const std::string Label;
474 DIEObjectLabel(const std::string &L) : DIEValue(isAsIsLabel), Label(L) {}
476 // Implement isa/cast/dyncast.
477 static bool classof(const DIEObjectLabel *) { return true; }
478 static bool classof(const DIEValue *L) { return L->Type == isAsIsLabel; }
480 /// EmitValue - Emit label value.
482 virtual void EmitValue(const DwarfDebug &DD, unsigned Form) const;
484 /// SizeOf - Determine size of label value in bytes.
486 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
488 /// Profile - Used to gather unique data for the value folding set.
490 static void Profile(FoldingSetNodeID &ID, const std::string &Label) {
491 ID.AddInteger(isAsIsLabel);
494 virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label); }
497 virtual void print(std::ostream &O) {
498 O << "Obj: " << Label;
503 //===----------------------------------------------------------------------===//
504 /// DIEDelta - A simple label difference DIE.
506 class DIEDelta : public DIEValue {
508 const DWLabel LabelHi;
509 const DWLabel LabelLo;
511 DIEDelta(const DWLabel &Hi, const DWLabel &Lo)
512 : DIEValue(isDelta), LabelHi(Hi), LabelLo(Lo) {}
514 // Implement isa/cast/dyncast.
515 static bool classof(const DIEDelta *) { return true; }
516 static bool classof(const DIEValue *D) { return D->Type == isDelta; }
518 /// EmitValue - Emit delta value.
520 virtual void EmitValue(const DwarfDebug &DD, unsigned Form) const;
522 /// SizeOf - Determine size of delta value in bytes.
524 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
526 /// Profile - Used to gather unique data for the value folding set.
528 static void Profile(FoldingSetNodeID &ID, const DWLabel &LabelHi,
529 const DWLabel &LabelLo) {
530 ID.AddInteger(isDelta);
534 virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, LabelHi, LabelLo); }
537 virtual void print(std::ostream &O) {
546 //===----------------------------------------------------------------------===//
547 /// DIEntry - A pointer to another debug information entry. An instance of this
548 /// class can also be used as a proxy for a debug information entry not yet
549 /// defined (ie. types.)
550 class DIEntry : public DIEValue {
554 DIEntry(DIE *E) : DIEValue(isEntry), Entry(E) {}
556 // Implement isa/cast/dyncast.
557 static bool classof(const DIEntry *) { return true; }
558 static bool classof(const DIEValue *E) { return E->Type == isEntry; }
560 /// EmitValue - Emit debug information entry offset.
562 virtual void EmitValue(const DwarfDebug &DD, unsigned Form) const;
564 /// SizeOf - Determine size of debug information entry in bytes.
566 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const {
567 return sizeof(int32_t);
570 /// Profile - Used to gather unique data for the value folding set.
572 static void Profile(FoldingSetNodeID &ID, DIE *Entry) {
573 ID.AddInteger(isEntry);
574 ID.AddPointer(Entry);
576 virtual void Profile(FoldingSetNodeID &ID) {
577 ID.AddInteger(isEntry);
580 ID.AddPointer(Entry);
587 virtual void print(std::ostream &O) {
588 O << "Die: 0x" << std::hex << (intptr_t)Entry << std::dec;
593 //===----------------------------------------------------------------------===//
594 /// DIEBlock - A block of values. Primarily used for location expressions.
596 class DIEBlock : public DIEValue, public DIE {
598 unsigned Size; // Size in bytes excluding size header.
608 // Implement isa/cast/dyncast.
609 static bool classof(const DIEBlock *) { return true; }
610 static bool classof(const DIEValue *E) { return E->Type == isBlock; }
612 /// ComputeSize - calculate the size of the block.
614 unsigned ComputeSize(DwarfDebug &DD);
616 /// BestForm - Choose the best form for data.
618 unsigned BestForm() const {
619 if ((unsigned char)Size == Size) return DW_FORM_block1;
620 if ((unsigned short)Size == Size) return DW_FORM_block2;
621 if ((unsigned int)Size == Size) return DW_FORM_block4;
622 return DW_FORM_block;
625 /// EmitValue - Emit block data.
627 virtual void EmitValue(const DwarfDebug &DD, unsigned Form) const;
629 /// SizeOf - Determine size of block data in bytes.
631 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
634 /// Profile - Used to gather unique data for the value folding set.
636 virtual void Profile(FoldingSetNodeID &ID) {
637 ID.AddInteger(isBlock);
642 virtual void print(std::ostream &O) {
649 //===----------------------------------------------------------------------===//
650 /// CompileUnit - This dwarf writer support class manages information associate
651 /// with a source file.
654 /// Desc - Compile unit debug descriptor.
656 CompileUnitDesc *Desc;
658 /// ID - File identifier for source.
662 /// Die - Compile unit debug information entry.
666 /// DescToDieMap - Tracks the mapping of unit level debug informaton
667 /// descriptors to debug information entries.
668 std::map<DebugInfoDesc *, DIE *> DescToDieMap;
670 /// DescToDIEntryMap - Tracks the mapping of unit level debug informaton
671 /// descriptors to debug information entries using a DIEntry proxy.
672 std::map<DebugInfoDesc *, DIEntry *> DescToDIEntryMap;
674 /// Globals - A map of globally visible named entities for this unit.
676 std::map<std::string, DIE *> Globals;
678 /// DiesSet - Used to uniquely define dies within the compile unit.
680 FoldingSet<DIE> DiesSet;
682 /// Dies - List of all dies in the compile unit.
684 std::vector<DIE *> Dies;
687 CompileUnit(CompileUnitDesc *CUD, unsigned I, DIE *D)
694 , DiesSet(InitDiesSetSize)
701 for (unsigned i = 0, N = Dies.size(); i < N; ++i)
706 CompileUnitDesc *getDesc() const { return Desc; }
707 unsigned getID() const { return ID; }
708 DIE* getDie() const { return Die; }
709 std::map<std::string, DIE *> &getGlobals() { return Globals; }
711 /// hasContent - Return true if this compile unit has something to write out.
713 bool hasContent() const {
714 return !Die->getChildren().empty();
717 /// AddGlobal - Add a new global entity to the compile unit.
719 void AddGlobal(const std::string &Name, DIE *Die) {
723 /// getDieMapSlotFor - Returns the debug information entry map slot for the
724 /// specified debug descriptor.
725 DIE *&getDieMapSlotFor(DebugInfoDesc *DID) {
726 return DescToDieMap[DID];
729 /// getDIEntrySlotFor - Returns the debug information entry proxy slot for the
730 /// specified debug descriptor.
731 DIEntry *&getDIEntrySlotFor(DebugInfoDesc *DID) {
732 return DescToDIEntryMap[DID];
735 /// AddDie - Adds or interns the DIE to the compile unit.
737 DIE *AddDie(DIE &Buffer) {
741 DIE *Die = DiesSet.FindNodeOrInsertPos(ID, Where);
744 Die = new DIE(Buffer);
745 DiesSet.InsertNode(Die, Where);
746 this->Die->AddChild(Die);
754 //===----------------------------------------------------------------------===//
755 /// Dwarf - Emits general Dwarf directives.
761 //===--------------------------------------------------------------------===//
762 // Core attributes used by the Dwarf writer.
766 /// O - Stream to .s file.
770 /// Asm - Target of Dwarf emission.
774 /// TAI - Target Asm Printer.
775 const TargetAsmInfo *TAI;
777 /// TD - Target data.
778 const TargetData *TD;
780 /// RI - Register Information.
781 const MRegisterInfo *RI;
783 /// M - Current module.
787 /// MF - Current machine function.
791 /// MMI - Collected machine module information.
793 MachineModuleInfo *MMI;
795 /// SubprogramCount - The running count of functions being compiled.
797 unsigned SubprogramCount;
799 Dwarf(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
803 , TD(Asm->TM.getTargetData())
804 , RI(Asm->TM.getRegisterInfo())
814 //===--------------------------------------------------------------------===//
817 AsmPrinter *getAsm() const { return Asm; }
818 MachineModuleInfo *getMMI() const { return MMI; }
819 const TargetAsmInfo *getTargetAsmInfo() const { return TAI; }
821 /// PrintLabelName - Print label name in form used by Dwarf writer.
823 void PrintLabelName(DWLabel Label) const {
824 PrintLabelName(Label.Tag, Label.Number);
826 void PrintLabelName(const char *Tag, unsigned Number) const {
827 O << TAI->getPrivateGlobalPrefix() << Tag;
828 if (Number) O << Number;
831 /// EmitLabel - Emit location label for internal use by Dwarf.
833 void EmitLabel(DWLabel Label) const {
834 EmitLabel(Label.Tag, Label.Number);
836 void EmitLabel(const char *Tag, unsigned Number) const {
837 PrintLabelName(Tag, Number);
841 /// EmitReference - Emit a reference to a label.
843 void EmitReference(DWLabel Label, bool IsPCRelative = false) const {
844 EmitReference(Label.Tag, Label.Number, IsPCRelative);
846 void EmitReference(const char *Tag, unsigned Number,
847 bool IsPCRelative = false) const {
848 if (TAI->getAddressSize() == sizeof(int32_t))
849 O << TAI->getData32bitsDirective();
851 O << TAI->getData64bitsDirective();
853 PrintLabelName(Tag, Number);
855 if (IsPCRelative) O << "-" << TAI->getPCSymbol();
857 void EmitReference(const std::string &Name, bool IsPCRelative = false) const {
858 if (TAI->getAddressSize() == sizeof(int32_t))
859 O << TAI->getData32bitsDirective();
861 O << TAI->getData64bitsDirective();
865 if (IsPCRelative) O << "-" << TAI->getPCSymbol();
868 /// EmitDifference - Emit the difference between two labels. Some
869 /// assemblers do not behave with absolute expressions with data directives,
870 /// so there is an option (needsSet) to use an intermediary set expression.
871 void EmitDifference(DWLabel LabelHi, DWLabel LabelLo,
872 bool IsSmall = false) const {
873 EmitDifference(LabelHi.Tag, LabelHi.Number,
874 LabelLo.Tag, LabelLo.Number,
877 void EmitDifference(const char *TagHi, unsigned NumberHi,
878 const char *TagLo, unsigned NumberLo,
879 bool IsSmall = false) const {
880 if (TAI->needsSet()) {
881 static unsigned SetCounter = 1;
884 PrintLabelName("set", SetCounter);
886 PrintLabelName(TagHi, NumberHi);
888 PrintLabelName(TagLo, NumberLo);
891 if (IsSmall || TAI->getAddressSize() == sizeof(int32_t))
892 O << TAI->getData32bitsDirective();
894 O << TAI->getData64bitsDirective();
896 PrintLabelName("set", SetCounter);
900 if (IsSmall || TAI->getAddressSize() == sizeof(int32_t))
901 O << TAI->getData32bitsDirective();
903 O << TAI->getData64bitsDirective();
905 PrintLabelName(TagHi, NumberHi);
907 PrintLabelName(TagLo, NumberLo);
911 /// EmitFrameMoves - Emit frame instructions to describe the layout of the
913 void EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
914 std::vector<MachineMove> &Moves) {
916 Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
917 TargetFrameInfo::StackGrowsUp ?
918 TAI->getAddressSize() : -TAI->getAddressSize();
919 bool IsLocal = BaseLabel && strcmp(BaseLabel, "label") == 0;
921 for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
922 MachineMove &Move = Moves[i];
923 unsigned LabelID = Move.getLabelID();
926 LabelID = MMI->MappedLabel(LabelID);
928 // Throw out move if the label is invalid.
929 if (!LabelID) continue;
932 const MachineLocation &Dst = Move.getDestination();
933 const MachineLocation &Src = Move.getSource();
935 // Advance row if new location.
936 if (BaseLabel && LabelID && (BaseLabelID != LabelID || !IsLocal)) {
937 Asm->EmitInt8(DW_CFA_advance_loc4);
938 Asm->EOL("DW_CFA_advance_loc4");
939 EmitDifference("label", LabelID, BaseLabel, BaseLabelID, true);
942 BaseLabelID = LabelID;
948 if (Dst.isRegister() && Dst.getRegister() == MachineLocation::VirtualFP) {
949 if (!Src.isRegister()) {
950 if (Src.getRegister() == MachineLocation::VirtualFP) {
951 Asm->EmitInt8(DW_CFA_def_cfa_offset);
952 Asm->EOL("DW_CFA_def_cfa_offset");
954 Asm->EmitInt8(DW_CFA_def_cfa);
955 Asm->EOL("DW_CFA_def_cfa");
956 Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Src.getRegister()));
957 Asm->EOL("Register");
960 int Offset = -Src.getOffset();
962 Asm->EmitULEB128Bytes(Offset);
965 assert(0 && "Machine move no supported yet.");
967 } else if (Src.isRegister() &&
968 Src.getRegister() == MachineLocation::VirtualFP) {
969 if (Dst.isRegister()) {
970 Asm->EmitInt8(DW_CFA_def_cfa_register);
971 Asm->EOL("DW_CFA_def_cfa_register");
972 Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Dst.getRegister()));
973 Asm->EOL("Register");
975 assert(0 && "Machine move no supported yet.");
978 unsigned Reg = RI->getDwarfRegNum(Src.getRegister());
979 int Offset = Dst.getOffset() / stackGrowth;
982 Asm->EmitInt8(DW_CFA_offset_extended_sf);
983 Asm->EOL("DW_CFA_offset_extended_sf");
984 Asm->EmitULEB128Bytes(Reg);
986 Asm->EmitSLEB128Bytes(Offset);
988 } else if (Reg < 64) {
989 Asm->EmitInt8(DW_CFA_offset + Reg);
990 Asm->EOL("DW_CFA_offset + Reg");
991 Asm->EmitULEB128Bytes(Offset);
994 Asm->EmitInt8(DW_CFA_offset_extended);
995 Asm->EOL("DW_CFA_offset_extended");
996 Asm->EmitULEB128Bytes(Reg);
998 Asm->EmitULEB128Bytes(Offset);
1007 //===----------------------------------------------------------------------===//
1008 /// DwarfDebug - Emits Dwarf debug directives.
1010 class DwarfDebug : public Dwarf {
1013 //===--------------------------------------------------------------------===//
1014 // Attributes used to construct specific Dwarf sections.
1017 /// CompileUnits - All the compile units involved in this build. The index
1018 /// of each entry in this vector corresponds to the sources in MMI.
1019 std::vector<CompileUnit *> CompileUnits;
1021 /// AbbreviationsSet - Used to uniquely define abbreviations.
1023 FoldingSet<DIEAbbrev> AbbreviationsSet;
1025 /// Abbreviations - A list of all the unique abbreviations in use.
1027 std::vector<DIEAbbrev *> Abbreviations;
1029 /// ValuesSet - Used to uniquely define values.
1031 FoldingSet<DIEValue> ValuesSet;
1033 /// Values - A list of all the unique values in use.
1035 std::vector<DIEValue *> Values;
1037 /// StringPool - A UniqueVector of strings used by indirect references.
1039 UniqueVector<std::string> StringPool;
1041 /// UnitMap - Map debug information descriptor to compile unit.
1043 std::map<DebugInfoDesc *, CompileUnit *> DescToUnitMap;
1045 /// SectionMap - Provides a unique id per text section.
1047 UniqueVector<std::string> SectionMap;
1049 /// SectionSourceLines - Tracks line numbers per text section.
1051 std::vector<std::vector<SourceLineInfo> > SectionSourceLines;
1053 /// didInitial - Flag to indicate if initial emission has been done.
1057 /// shouldEmit - Flag to indicate if debug information should be emitted.
1063 /// ShouldEmitDwarf - Returns true if Dwarf declarations should be made.
1065 bool ShouldEmitDwarf() const { return shouldEmit; }
1067 /// AssignAbbrevNumber - Define a unique number for the abbreviation.
1069 void AssignAbbrevNumber(DIEAbbrev &Abbrev) {
1070 // Profile the node so that we can make it unique.
1071 FoldingSetNodeID ID;
1074 // Check the set for priors.
1075 DIEAbbrev *InSet = AbbreviationsSet.GetOrInsertNode(&Abbrev);
1077 // If it's newly added.
1078 if (InSet == &Abbrev) {
1079 // Add to abbreviation list.
1080 Abbreviations.push_back(&Abbrev);
1081 // Assign the vector position + 1 as its number.
1082 Abbrev.setNumber(Abbreviations.size());
1084 // Assign existing abbreviation number.
1085 Abbrev.setNumber(InSet->getNumber());
1089 /// NewString - Add a string to the constant pool and returns a label.
1091 DWLabel NewString(const std::string &String) {
1092 unsigned StringID = StringPool.insert(String);
1093 return DWLabel("string", StringID);
1096 /// NewDIEntry - Creates a new DIEntry to be a proxy for a debug information
1098 DIEntry *NewDIEntry(DIE *Entry = NULL) {
1102 FoldingSetNodeID ID;
1103 DIEntry::Profile(ID, Entry);
1105 Value = static_cast<DIEntry *>(ValuesSet.FindNodeOrInsertPos(ID, Where));
1107 if (Value) return Value;
1109 Value = new DIEntry(Entry);
1110 ValuesSet.InsertNode(Value, Where);
1112 Value = new DIEntry(Entry);
1115 Values.push_back(Value);
1119 /// SetDIEntry - Set a DIEntry once the debug information entry is defined.
1121 void SetDIEntry(DIEntry *Value, DIE *Entry) {
1122 Value->Entry = Entry;
1123 // Add to values set if not already there. If it is, we merely have a
1124 // duplicate in the values list (no harm.)
1125 ValuesSet.GetOrInsertNode(Value);
1128 /// AddUInt - Add an unsigned integer attribute data and value.
1130 void AddUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer) {
1131 if (!Form) Form = DIEInteger::BestForm(false, Integer);
1133 FoldingSetNodeID ID;
1134 DIEInteger::Profile(ID, Integer);
1136 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1138 Value = new DIEInteger(Integer);
1139 ValuesSet.InsertNode(Value, Where);
1140 Values.push_back(Value);
1143 Die->AddValue(Attribute, Form, Value);
1146 /// AddSInt - Add an signed integer attribute data and value.
1148 void AddSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer) {
1149 if (!Form) Form = DIEInteger::BestForm(true, Integer);
1151 FoldingSetNodeID ID;
1152 DIEInteger::Profile(ID, (uint64_t)Integer);
1154 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1156 Value = new DIEInteger(Integer);
1157 ValuesSet.InsertNode(Value, Where);
1158 Values.push_back(Value);
1161 Die->AddValue(Attribute, Form, Value);
1164 /// AddString - Add a std::string attribute data and value.
1166 void AddString(DIE *Die, unsigned Attribute, unsigned Form,
1167 const std::string &String) {
1168 FoldingSetNodeID ID;
1169 DIEString::Profile(ID, String);
1171 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1173 Value = new DIEString(String);
1174 ValuesSet.InsertNode(Value, Where);
1175 Values.push_back(Value);
1178 Die->AddValue(Attribute, Form, Value);
1181 /// AddLabel - Add a Dwarf label attribute data and value.
1183 void AddLabel(DIE *Die, unsigned Attribute, unsigned Form,
1184 const DWLabel &Label) {
1185 FoldingSetNodeID ID;
1186 DIEDwarfLabel::Profile(ID, Label);
1188 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1190 Value = new DIEDwarfLabel(Label);
1191 ValuesSet.InsertNode(Value, Where);
1192 Values.push_back(Value);
1195 Die->AddValue(Attribute, Form, Value);
1198 /// AddObjectLabel - Add an non-Dwarf label attribute data and value.
1200 void AddObjectLabel(DIE *Die, unsigned Attribute, unsigned Form,
1201 const std::string &Label) {
1202 FoldingSetNodeID ID;
1203 DIEObjectLabel::Profile(ID, Label);
1205 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1207 Value = new DIEObjectLabel(Label);
1208 ValuesSet.InsertNode(Value, Where);
1209 Values.push_back(Value);
1212 Die->AddValue(Attribute, Form, Value);
1215 /// AddDelta - Add a label delta attribute data and value.
1217 void AddDelta(DIE *Die, unsigned Attribute, unsigned Form,
1218 const DWLabel &Hi, const DWLabel &Lo) {
1219 FoldingSetNodeID ID;
1220 DIEDelta::Profile(ID, Hi, Lo);
1222 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1224 Value = new DIEDelta(Hi, Lo);
1225 ValuesSet.InsertNode(Value, Where);
1226 Values.push_back(Value);
1229 Die->AddValue(Attribute, Form, Value);
1232 /// AddDIEntry - Add a DIE attribute data and value.
1234 void AddDIEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry) {
1235 Die->AddValue(Attribute, Form, NewDIEntry(Entry));
1238 /// AddBlock - Add block data.
1240 void AddBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block) {
1241 Block->ComputeSize(*this);
1242 FoldingSetNodeID ID;
1245 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1248 ValuesSet.InsertNode(Value, Where);
1249 Values.push_back(Value);
1254 Die->AddValue(Attribute, Block->BestForm(), Value);
1259 /// AddSourceLine - Add location information to specified debug information
1261 void AddSourceLine(DIE *Die, CompileUnitDesc *File, unsigned Line) {
1263 CompileUnit *FileUnit = FindCompileUnit(File);
1264 unsigned FileID = FileUnit->getID();
1265 AddUInt(Die, DW_AT_decl_file, 0, FileID);
1266 AddUInt(Die, DW_AT_decl_line, 0, Line);
1270 /// AddAddress - Add an address attribute to a die based on the location
1272 void AddAddress(DIE *Die, unsigned Attribute,
1273 const MachineLocation &Location) {
1274 unsigned Reg = RI->getDwarfRegNum(Location.getRegister());
1275 DIEBlock *Block = new DIEBlock();
1277 if (Location.isRegister()) {
1279 AddUInt(Block, 0, DW_FORM_data1, DW_OP_reg0 + Reg);
1281 AddUInt(Block, 0, DW_FORM_data1, DW_OP_regx);
1282 AddUInt(Block, 0, DW_FORM_udata, Reg);
1286 AddUInt(Block, 0, DW_FORM_data1, DW_OP_breg0 + Reg);
1288 AddUInt(Block, 0, DW_FORM_data1, DW_OP_bregx);
1289 AddUInt(Block, 0, DW_FORM_udata, Reg);
1291 AddUInt(Block, 0, DW_FORM_sdata, Location.getOffset());
1294 AddBlock(Die, Attribute, 0, Block);
1297 /// AddBasicType - Add a new basic type attribute to the specified entity.
1299 void AddBasicType(DIE *Entity, CompileUnit *Unit,
1300 const std::string &Name,
1301 unsigned Encoding, unsigned Size) {
1302 DIE *Die = ConstructBasicType(Unit, Name, Encoding, Size);
1303 AddDIEntry(Entity, DW_AT_type, DW_FORM_ref4, Die);
1306 /// ConstructBasicType - Construct a new basic type.
1308 DIE *ConstructBasicType(CompileUnit *Unit,
1309 const std::string &Name,
1310 unsigned Encoding, unsigned Size) {
1311 DIE Buffer(DW_TAG_base_type);
1312 AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
1313 AddUInt(&Buffer, DW_AT_encoding, DW_FORM_data1, Encoding);
1314 if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
1315 return Unit->AddDie(Buffer);
1318 /// AddPointerType - Add a new pointer type attribute to the specified entity.
1320 void AddPointerType(DIE *Entity, CompileUnit *Unit, const std::string &Name) {
1321 DIE *Die = ConstructPointerType(Unit, Name);
1322 AddDIEntry(Entity, DW_AT_type, DW_FORM_ref4, Die);
1325 /// ConstructPointerType - Construct a new pointer type.
1327 DIE *ConstructPointerType(CompileUnit *Unit, const std::string &Name) {
1328 DIE Buffer(DW_TAG_pointer_type);
1329 AddUInt(&Buffer, DW_AT_byte_size, 0, TAI->getAddressSize());
1330 if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
1331 return Unit->AddDie(Buffer);
1334 /// AddType - Add a new type attribute to the specified entity.
1336 void AddType(DIE *Entity, TypeDesc *TyDesc, CompileUnit *Unit) {
1338 AddBasicType(Entity, Unit, "", DW_ATE_signed, sizeof(int32_t));
1340 // Check for pre-existence.
1341 DIEntry *&Slot = Unit->getDIEntrySlotFor(TyDesc);
1343 // If it exists then use the existing value.
1345 Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot);
1349 if (SubprogramDesc *SubprogramTy = dyn_cast<SubprogramDesc>(TyDesc)) {
1350 // FIXME - Not sure why programs and variables are coming through here.
1351 // Short cut for handling subprogram types (not really a TyDesc.)
1352 AddPointerType(Entity, Unit, SubprogramTy->getName());
1353 } else if (GlobalVariableDesc *GlobalTy =
1354 dyn_cast<GlobalVariableDesc>(TyDesc)) {
1355 // FIXME - Not sure why programs and variables are coming through here.
1356 // Short cut for handling global variable types (not really a TyDesc.)
1357 AddPointerType(Entity, Unit, GlobalTy->getName());
1360 Slot = NewDIEntry();
1363 DIE Buffer(DW_TAG_base_type);
1364 ConstructType(Buffer, TyDesc, Unit);
1366 // Add debug information entry to entity and unit.
1367 DIE *Die = Unit->AddDie(Buffer);
1368 SetDIEntry(Slot, Die);
1369 Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot);
1374 /// ConstructType - Adds all the required attributes to the type.
1376 void ConstructType(DIE &Buffer, TypeDesc *TyDesc, CompileUnit *Unit) {
1377 // Get core information.
1378 const std::string &Name = TyDesc->getName();
1379 uint64_t Size = TyDesc->getSize() >> 3;
1381 if (BasicTypeDesc *BasicTy = dyn_cast<BasicTypeDesc>(TyDesc)) {
1382 // Fundamental types like int, float, bool
1383 Buffer.setTag(DW_TAG_base_type);
1384 AddUInt(&Buffer, DW_AT_encoding, DW_FORM_data1, BasicTy->getEncoding());
1385 } else if (DerivedTypeDesc *DerivedTy = dyn_cast<DerivedTypeDesc>(TyDesc)) {
1387 unsigned Tag = DerivedTy->getTag();
1388 // FIXME - Workaround for templates.
1389 if (Tag == DW_TAG_inheritance) Tag = DW_TAG_reference_type;
1390 // Pointers, typedefs et al.
1392 // Map to main type, void will not have a type.
1393 if (TypeDesc *FromTy = DerivedTy->getFromType())
1394 AddType(&Buffer, FromTy, Unit);
1395 } else if (CompositeTypeDesc *CompTy = dyn_cast<CompositeTypeDesc>(TyDesc)){
1397 unsigned Tag = CompTy->getTag();
1399 // Set tag accordingly.
1400 if (Tag == DW_TAG_vector_type)
1401 Buffer.setTag(DW_TAG_array_type);
1405 std::vector<DebugInfoDesc *> &Elements = CompTy->getElements();
1408 case DW_TAG_vector_type:
1409 AddUInt(&Buffer, DW_AT_GNU_vector, DW_FORM_flag, 1);
1411 case DW_TAG_array_type: {
1412 // Add element type.
1413 if (TypeDesc *FromTy = CompTy->getFromType())
1414 AddType(&Buffer, FromTy, Unit);
1416 // Don't emit size attribute.
1419 // Construct an anonymous type for index type.
1420 DIE *IndexTy = ConstructBasicType(Unit, "", DW_ATE_signed,
1423 // Add subranges to array type.
1424 for(unsigned i = 0, N = Elements.size(); i < N; ++i) {
1425 SubrangeDesc *SRD = cast<SubrangeDesc>(Elements[i]);
1426 int64_t Lo = SRD->getLo();
1427 int64_t Hi = SRD->getHi();
1428 DIE *Subrange = new DIE(DW_TAG_subrange_type);
1430 // If a range is available.
1432 AddDIEntry(Subrange, DW_AT_type, DW_FORM_ref4, IndexTy);
1433 // Only add low if non-zero.
1434 if (Lo) AddSInt(Subrange, DW_AT_lower_bound, 0, Lo);
1435 AddSInt(Subrange, DW_AT_upper_bound, 0, Hi);
1438 Buffer.AddChild(Subrange);
1442 case DW_TAG_structure_type:
1443 case DW_TAG_union_type: {
1444 // Add elements to structure type.
1445 for(unsigned i = 0, N = Elements.size(); i < N; ++i) {
1446 DebugInfoDesc *Element = Elements[i];
1448 if (DerivedTypeDesc *MemberDesc = dyn_cast<DerivedTypeDesc>(Element)){
1449 // Add field or base class.
1451 unsigned Tag = MemberDesc->getTag();
1453 // Extract the basic information.
1454 const std::string &Name = MemberDesc->getName();
1455 uint64_t Size = MemberDesc->getSize();
1456 uint64_t Align = MemberDesc->getAlign();
1457 uint64_t Offset = MemberDesc->getOffset();
1459 // Construct member debug information entry.
1460 DIE *Member = new DIE(Tag);
1462 // Add name if not "".
1464 AddString(Member, DW_AT_name, DW_FORM_string, Name);
1465 // Add location if available.
1466 AddSourceLine(Member, MemberDesc->getFile(), MemberDesc->getLine());
1468 // Most of the time the field info is the same as the members.
1469 uint64_t FieldSize = Size;
1470 uint64_t FieldAlign = Align;
1471 uint64_t FieldOffset = Offset;
1473 // Set the member type.
1474 TypeDesc *FromTy = MemberDesc->getFromType();
1475 AddType(Member, FromTy, Unit);
1477 // Walk up typedefs until a real size is found.
1479 if (FromTy->getTag() != DW_TAG_typedef) {
1480 FieldSize = FromTy->getSize();
1481 FieldAlign = FromTy->getSize();
1485 FromTy = dyn_cast<DerivedTypeDesc>(FromTy)->getFromType();
1488 // Unless we have a bit field.
1489 if (Tag == DW_TAG_member && FieldSize != Size) {
1490 // Construct the alignment mask.
1491 uint64_t AlignMask = ~(FieldAlign - 1);
1492 // Determine the high bit + 1 of the declared size.
1493 uint64_t HiMark = (Offset + FieldSize) & AlignMask;
1494 // Work backwards to determine the base offset of the field.
1495 FieldOffset = HiMark - FieldSize;
1496 // Now normalize offset to the field.
1497 Offset -= FieldOffset;
1499 // Maybe we need to work from the other end.
1500 if (TD->isLittleEndian()) Offset = FieldSize - (Offset + Size);
1502 // Add size and offset.
1503 AddUInt(Member, DW_AT_byte_size, 0, FieldSize >> 3);
1504 AddUInt(Member, DW_AT_bit_size, 0, Size);
1505 AddUInt(Member, DW_AT_bit_offset, 0, Offset);
1508 // Add computation for offset.
1509 DIEBlock *Block = new DIEBlock();
1510 AddUInt(Block, 0, DW_FORM_data1, DW_OP_plus_uconst);
1511 AddUInt(Block, 0, DW_FORM_udata, FieldOffset >> 3);
1512 AddBlock(Member, DW_AT_data_member_location, 0, Block);
1514 // Add accessibility (public default unless is base class.
1515 if (MemberDesc->isProtected()) {
1516 AddUInt(Member, DW_AT_accessibility, 0, DW_ACCESS_protected);
1517 } else if (MemberDesc->isPrivate()) {
1518 AddUInt(Member, DW_AT_accessibility, 0, DW_ACCESS_private);
1519 } else if (Tag == DW_TAG_inheritance) {
1520 AddUInt(Member, DW_AT_accessibility, 0, DW_ACCESS_public);
1523 Buffer.AddChild(Member);
1524 } else if (GlobalVariableDesc *StaticDesc =
1525 dyn_cast<GlobalVariableDesc>(Element)) {
1526 // Add static member.
1528 // Construct member debug information entry.
1529 DIE *Static = new DIE(DW_TAG_variable);
1531 // Add name and mangled name.
1532 const std::string &Name = StaticDesc->getName();
1533 const std::string &LinkageName = StaticDesc->getLinkageName();
1534 AddString(Static, DW_AT_name, DW_FORM_string, Name);
1535 if (!LinkageName.empty()) {
1536 AddString(Static, DW_AT_MIPS_linkage_name, DW_FORM_string,
1541 AddSourceLine(Static, StaticDesc->getFile(), StaticDesc->getLine());
1544 if (TypeDesc *StaticTy = StaticDesc->getType())
1545 AddType(Static, StaticTy, Unit);
1548 if (!StaticDesc->isStatic())
1549 AddUInt(Static, DW_AT_external, DW_FORM_flag, 1);
1550 AddUInt(Static, DW_AT_declaration, DW_FORM_flag, 1);
1552 Buffer.AddChild(Static);
1553 } else if (SubprogramDesc *MethodDesc =
1554 dyn_cast<SubprogramDesc>(Element)) {
1555 // Add member function.
1557 // Construct member debug information entry.
1558 DIE *Method = new DIE(DW_TAG_subprogram);
1560 // Add name and mangled name.
1561 const std::string &Name = MethodDesc->getName();
1562 const std::string &LinkageName = MethodDesc->getLinkageName();
1564 AddString(Method, DW_AT_name, DW_FORM_string, Name);
1565 bool IsCTor = TyDesc->getName() == Name;
1567 if (!LinkageName.empty()) {
1568 AddString(Method, DW_AT_MIPS_linkage_name, DW_FORM_string,
1573 AddSourceLine(Method, MethodDesc->getFile(), MethodDesc->getLine());
1576 if (CompositeTypeDesc *MethodTy =
1577 dyn_cast_or_null<CompositeTypeDesc>(MethodDesc->getType())) {
1578 // Get argument information.
1579 std::vector<DebugInfoDesc *> &Args = MethodTy->getElements();
1584 AddType(Method, dyn_cast<TypeDesc>(Args[0]), Unit);
1588 for(unsigned i = 1, N = Args.size(); i < N; ++i) {
1589 DIE *Arg = new DIE(DW_TAG_formal_parameter);
1590 AddType(Arg, cast<TypeDesc>(Args[i]), Unit);
1591 AddUInt(Arg, DW_AT_artificial, DW_FORM_flag, 1);
1592 Method->AddChild(Arg);
1597 if (!MethodDesc->isStatic())
1598 AddUInt(Method, DW_AT_external, DW_FORM_flag, 1);
1599 AddUInt(Method, DW_AT_declaration, DW_FORM_flag, 1);
1601 Buffer.AddChild(Method);
1606 case DW_TAG_enumeration_type: {
1607 // Add enumerators to enumeration type.
1608 for(unsigned i = 0, N = Elements.size(); i < N; ++i) {
1609 EnumeratorDesc *ED = cast<EnumeratorDesc>(Elements[i]);
1610 const std::string &Name = ED->getName();
1611 int64_t Value = ED->getValue();
1612 DIE *Enumerator = new DIE(DW_TAG_enumerator);
1613 AddString(Enumerator, DW_AT_name, DW_FORM_string, Name);
1614 AddSInt(Enumerator, DW_AT_const_value, DW_FORM_sdata, Value);
1615 Buffer.AddChild(Enumerator);
1620 case DW_TAG_subroutine_type: {
1621 // Add prototype flag.
1622 AddUInt(&Buffer, DW_AT_prototyped, DW_FORM_flag, 1);
1624 AddType(&Buffer, dyn_cast<TypeDesc>(Elements[0]), Unit);
1627 for(unsigned i = 1, N = Elements.size(); i < N; ++i) {
1628 DIE *Arg = new DIE(DW_TAG_formal_parameter);
1629 AddType(Arg, cast<TypeDesc>(Elements[i]), Unit);
1630 Buffer.AddChild(Arg);
1639 // Add size if non-zero (derived types don't have a size.)
1640 if (Size) AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
1641 // Add name if not anonymous or intermediate type.
1642 if (!Name.empty()) AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
1643 // Add source line info if available.
1644 AddSourceLine(&Buffer, TyDesc->getFile(), TyDesc->getLine());
1647 /// NewCompileUnit - Create new compile unit and it's debug information entry.
1649 CompileUnit *NewCompileUnit(CompileUnitDesc *UnitDesc, unsigned ID) {
1650 // Construct debug information entry.
1651 DIE *Die = new DIE(DW_TAG_compile_unit);
1652 AddDelta(Die, DW_AT_stmt_list, DW_FORM_data4, DWLabel("section_line", 0),
1653 DWLabel("section_line", 0));
1654 AddString(Die, DW_AT_producer, DW_FORM_string, UnitDesc->getProducer());
1655 AddUInt (Die, DW_AT_language, DW_FORM_data1, UnitDesc->getLanguage());
1656 AddString(Die, DW_AT_name, DW_FORM_string, UnitDesc->getFileName());
1657 AddString(Die, DW_AT_comp_dir, DW_FORM_string, UnitDesc->getDirectory());
1659 // Construct compile unit.
1660 CompileUnit *Unit = new CompileUnit(UnitDesc, ID, Die);
1662 // Add Unit to compile unit map.
1663 DescToUnitMap[UnitDesc] = Unit;
1668 /// GetBaseCompileUnit - Get the main compile unit.
1670 CompileUnit *GetBaseCompileUnit() const {
1671 CompileUnit *Unit = CompileUnits[0];
1672 assert(Unit && "Missing compile unit.");
1676 /// FindCompileUnit - Get the compile unit for the given descriptor.
1678 CompileUnit *FindCompileUnit(CompileUnitDesc *UnitDesc) {
1679 CompileUnit *Unit = DescToUnitMap[UnitDesc];
1680 assert(Unit && "Missing compile unit.");
1684 /// NewGlobalVariable - Add a new global variable DIE.
1686 DIE *NewGlobalVariable(GlobalVariableDesc *GVD) {
1687 // Get the compile unit context.
1688 CompileUnitDesc *UnitDesc =
1689 static_cast<CompileUnitDesc *>(GVD->getContext());
1690 CompileUnit *Unit = GetBaseCompileUnit();
1692 // Check for pre-existence.
1693 DIE *&Slot = Unit->getDieMapSlotFor(GVD);
1694 if (Slot) return Slot;
1696 // Get the global variable itself.
1697 GlobalVariable *GV = GVD->getGlobalVariable();
1699 const std::string &Name = GVD->getName();
1700 const std::string &FullName = GVD->getFullName();
1701 const std::string &LinkageName = GVD->getLinkageName();
1702 // Create the global's variable DIE.
1703 DIE *VariableDie = new DIE(DW_TAG_variable);
1704 AddString(VariableDie, DW_AT_name, DW_FORM_string, Name);
1705 if (!LinkageName.empty()) {
1706 AddString(VariableDie, DW_AT_MIPS_linkage_name, DW_FORM_string,
1709 AddType(VariableDie, GVD->getType(), Unit);
1710 if (!GVD->isStatic())
1711 AddUInt(VariableDie, DW_AT_external, DW_FORM_flag, 1);
1713 // Add source line info if available.
1714 AddSourceLine(VariableDie, UnitDesc, GVD->getLine());
1717 DIEBlock *Block = new DIEBlock();
1718 AddUInt(Block, 0, DW_FORM_data1, DW_OP_addr);
1719 AddObjectLabel(Block, 0, DW_FORM_udata, Asm->getGlobalLinkName(GV));
1720 AddBlock(VariableDie, DW_AT_location, 0, Block);
1725 // Add to context owner.
1726 Unit->getDie()->AddChild(VariableDie);
1728 // Expose as global.
1729 // FIXME - need to check external flag.
1730 Unit->AddGlobal(FullName, VariableDie);
1735 /// NewSubprogram - Add a new subprogram DIE.
1737 DIE *NewSubprogram(SubprogramDesc *SPD) {
1738 // Get the compile unit context.
1739 CompileUnitDesc *UnitDesc =
1740 static_cast<CompileUnitDesc *>(SPD->getContext());
1741 CompileUnit *Unit = GetBaseCompileUnit();
1743 // Check for pre-existence.
1744 DIE *&Slot = Unit->getDieMapSlotFor(SPD);
1745 if (Slot) return Slot;
1747 // Gather the details (simplify add attribute code.)
1748 const std::string &Name = SPD->getName();
1749 const std::string &FullName = SPD->getFullName();
1750 const std::string &LinkageName = SPD->getLinkageName();
1752 DIE *SubprogramDie = new DIE(DW_TAG_subprogram);
1753 AddString(SubprogramDie, DW_AT_name, DW_FORM_string, Name);
1754 if (!LinkageName.empty()) {
1755 AddString(SubprogramDie, DW_AT_MIPS_linkage_name, DW_FORM_string,
1758 if (SPD->getType()) AddType(SubprogramDie, SPD->getType(), Unit);
1759 if (!SPD->isStatic())
1760 AddUInt(SubprogramDie, DW_AT_external, DW_FORM_flag, 1);
1761 AddUInt(SubprogramDie, DW_AT_prototyped, DW_FORM_flag, 1);
1763 // Add source line info if available.
1764 AddSourceLine(SubprogramDie, UnitDesc, SPD->getLine());
1767 Slot = SubprogramDie;
1769 // Add to context owner.
1770 Unit->getDie()->AddChild(SubprogramDie);
1772 // Expose as global.
1773 Unit->AddGlobal(FullName, SubprogramDie);
1775 return SubprogramDie;
1778 /// NewScopeVariable - Create a new scope variable.
1780 DIE *NewScopeVariable(DebugVariable *DV, CompileUnit *Unit) {
1781 // Get the descriptor.
1782 VariableDesc *VD = DV->getDesc();
1784 // Translate tag to proper Dwarf tag. The result variable is dropped for
1787 switch (VD->getTag()) {
1788 case DW_TAG_return_variable: return NULL;
1789 case DW_TAG_arg_variable: Tag = DW_TAG_formal_parameter; break;
1790 case DW_TAG_auto_variable: // fall thru
1791 default: Tag = DW_TAG_variable; break;
1794 // Define variable debug information entry.
1795 DIE *VariableDie = new DIE(Tag);
1796 AddString(VariableDie, DW_AT_name, DW_FORM_string, VD->getName());
1798 // Add source line info if available.
1799 AddSourceLine(VariableDie, VD->getFile(), VD->getLine());
1801 // Add variable type.
1802 AddType(VariableDie, VD->getType(), Unit);
1804 // Add variable address.
1805 MachineLocation Location;
1806 RI->getLocation(*MF, DV->getFrameIndex(), Location);
1807 AddAddress(VariableDie, DW_AT_location, Location);
1812 /// ConstructScope - Construct the components of a scope.
1814 void ConstructScope(DebugScope *ParentScope,
1815 unsigned ParentStartID, unsigned ParentEndID,
1816 DIE *ParentDie, CompileUnit *Unit) {
1817 // Add variables to scope.
1818 std::vector<DebugVariable *> &Variables = ParentScope->getVariables();
1819 for (unsigned i = 0, N = Variables.size(); i < N; ++i) {
1820 DIE *VariableDie = NewScopeVariable(Variables[i], Unit);
1821 if (VariableDie) ParentDie->AddChild(VariableDie);
1824 // Add nested scopes.
1825 std::vector<DebugScope *> &Scopes = ParentScope->getScopes();
1826 for (unsigned j = 0, M = Scopes.size(); j < M; ++j) {
1827 // Define the Scope debug information entry.
1828 DebugScope *Scope = Scopes[j];
1829 // FIXME - Ignore inlined functions for the time being.
1830 if (!Scope->getParent()) continue;
1832 unsigned StartID = MMI->MappedLabel(Scope->getStartLabelID());
1833 unsigned EndID = MMI->MappedLabel(Scope->getEndLabelID());
1835 // Ignore empty scopes.
1836 if (StartID == EndID && StartID != 0) continue;
1837 if (Scope->getScopes().empty() && Scope->getVariables().empty()) continue;
1839 if (StartID == ParentStartID && EndID == ParentEndID) {
1840 // Just add stuff to the parent scope.
1841 ConstructScope(Scope, ParentStartID, ParentEndID, ParentDie, Unit);
1843 DIE *ScopeDie = new DIE(DW_TAG_lexical_block);
1845 // Add the scope bounds.
1847 AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr,
1848 DWLabel("label", StartID));
1850 AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr,
1851 DWLabel("func_begin", SubprogramCount));
1854 AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr,
1855 DWLabel("label", EndID));
1857 AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr,
1858 DWLabel("func_end", SubprogramCount));
1861 // Add the scope contents.
1862 ConstructScope(Scope, StartID, EndID, ScopeDie, Unit);
1863 ParentDie->AddChild(ScopeDie);
1868 /// ConstructRootScope - Construct the scope for the subprogram.
1870 void ConstructRootScope(DebugScope *RootScope) {
1871 // Exit if there is no root scope.
1872 if (!RootScope) return;
1874 // Get the subprogram debug information entry.
1875 SubprogramDesc *SPD = cast<SubprogramDesc>(RootScope->getDesc());
1877 // Get the compile unit context.
1878 CompileUnit *Unit = GetBaseCompileUnit();
1880 // Get the subprogram die.
1881 DIE *SPDie = Unit->getDieMapSlotFor(SPD);
1882 assert(SPDie && "Missing subprogram descriptor");
1884 // Add the function bounds.
1885 AddLabel(SPDie, DW_AT_low_pc, DW_FORM_addr,
1886 DWLabel("func_begin", SubprogramCount));
1887 AddLabel(SPDie, DW_AT_high_pc, DW_FORM_addr,
1888 DWLabel("func_end", SubprogramCount));
1889 MachineLocation Location(RI->getFrameRegister(*MF));
1890 AddAddress(SPDie, DW_AT_frame_base, Location);
1892 ConstructScope(RootScope, 0, 0, SPDie, Unit);
1895 /// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc
1896 /// tools to recognize the object file contains Dwarf information.
1897 void EmitInitial() {
1898 // Check to see if we already emitted intial headers.
1899 if (didInitial) return;
1902 // Dwarf sections base addresses.
1903 if (TAI->getDwarfRequiresFrameSection()) {
1904 Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
1905 EmitLabel("section_frame", 0);
1907 Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
1908 EmitLabel("section_info", 0);
1909 Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection());
1910 EmitLabel("section_abbrev", 0);
1911 Asm->SwitchToDataSection(TAI->getDwarfARangesSection());
1912 EmitLabel("section_aranges", 0);
1913 Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection());
1914 EmitLabel("section_macinfo", 0);
1915 Asm->SwitchToDataSection(TAI->getDwarfLineSection());
1916 EmitLabel("section_line", 0);
1917 Asm->SwitchToDataSection(TAI->getDwarfLocSection());
1918 EmitLabel("section_loc", 0);
1919 Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection());
1920 EmitLabel("section_pubnames", 0);
1921 Asm->SwitchToDataSection(TAI->getDwarfStrSection());
1922 EmitLabel("section_str", 0);
1923 Asm->SwitchToDataSection(TAI->getDwarfRangesSection());
1924 EmitLabel("section_ranges", 0);
1926 Asm->SwitchToTextSection(TAI->getTextSection());
1927 EmitLabel("text_begin", 0);
1928 Asm->SwitchToDataSection(TAI->getDataSection());
1929 EmitLabel("data_begin", 0);
1931 // Emit common frame information.
1932 EmitInitialDebugFrame();
1935 /// EmitDIE - Recusively Emits a debug information entry.
1937 void EmitDIE(DIE *Die) const {
1938 // Get the abbreviation for this DIE.
1939 unsigned AbbrevNumber = Die->getAbbrevNumber();
1940 const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
1944 // Emit the code (index) for the abbreviation.
1945 Asm->EmitULEB128Bytes(AbbrevNumber);
1946 Asm->EOL(std::string("Abbrev [" +
1947 utostr(AbbrevNumber) +
1948 "] 0x" + utohexstr(Die->getOffset()) +
1949 ":0x" + utohexstr(Die->getSize()) + " " +
1950 TagString(Abbrev->getTag())));
1952 const std::vector<DIEValue *> &Values = Die->getValues();
1953 const std::vector<DIEAbbrevData> &AbbrevData = Abbrev->getData();
1955 // Emit the DIE attribute values.
1956 for (unsigned i = 0, N = Values.size(); i < N; ++i) {
1957 unsigned Attr = AbbrevData[i].getAttribute();
1958 unsigned Form = AbbrevData[i].getForm();
1959 assert(Form && "Too many attributes for DIE (check abbreviation)");
1962 case DW_AT_sibling: {
1963 Asm->EmitInt32(Die->SiblingOffset());
1967 // Emit an attribute using the defined form.
1968 Values[i]->EmitValue(*this, Form);
1973 Asm->EOL(AttributeString(Attr));
1976 // Emit the DIE children if any.
1977 if (Abbrev->getChildrenFlag() == DW_CHILDREN_yes) {
1978 const std::vector<DIE *> &Children = Die->getChildren();
1980 for (unsigned j = 0, M = Children.size(); j < M; ++j) {
1981 EmitDIE(Children[j]);
1984 Asm->EmitInt8(0); Asm->EOL("End Of Children Mark");
1988 /// SizeAndOffsetDie - Compute the size and offset of a DIE.
1990 unsigned SizeAndOffsetDie(DIE *Die, unsigned Offset, bool Last) {
1991 // Get the children.
1992 const std::vector<DIE *> &Children = Die->getChildren();
1994 // If not last sibling and has children then add sibling offset attribute.
1995 if (!Last && !Children.empty()) Die->AddSiblingOffset();
1997 // Record the abbreviation.
1998 AssignAbbrevNumber(Die->getAbbrev());
2000 // Get the abbreviation for this DIE.
2001 unsigned AbbrevNumber = Die->getAbbrevNumber();
2002 const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
2005 Die->setOffset(Offset);
2007 // Start the size with the size of abbreviation code.
2008 Offset += Asm->SizeULEB128(AbbrevNumber);
2010 const std::vector<DIEValue *> &Values = Die->getValues();
2011 const std::vector<DIEAbbrevData> &AbbrevData = Abbrev->getData();
2013 // Size the DIE attribute values.
2014 for (unsigned i = 0, N = Values.size(); i < N; ++i) {
2015 // Size attribute value.
2016 Offset += Values[i]->SizeOf(*this, AbbrevData[i].getForm());
2019 // Size the DIE children if any.
2020 if (!Children.empty()) {
2021 assert(Abbrev->getChildrenFlag() == DW_CHILDREN_yes &&
2022 "Children flag not set");
2024 for (unsigned j = 0, M = Children.size(); j < M; ++j) {
2025 Offset = SizeAndOffsetDie(Children[j], Offset, (j + 1) == M);
2028 // End of children marker.
2029 Offset += sizeof(int8_t);
2032 Die->setSize(Offset - Die->getOffset());
2036 /// SizeAndOffsets - Compute the size and offset of all the DIEs.
2038 void SizeAndOffsets() {
2039 // Process base compile unit.
2040 CompileUnit *Unit = GetBaseCompileUnit();
2041 // Compute size of compile unit header
2042 unsigned Offset = sizeof(int32_t) + // Length of Compilation Unit Info
2043 sizeof(int16_t) + // DWARF version number
2044 sizeof(int32_t) + // Offset Into Abbrev. Section
2045 sizeof(int8_t); // Pointer Size (in bytes)
2046 SizeAndOffsetDie(Unit->getDie(), Offset, true);
2049 /// EmitDebugInfo - Emit the debug info section.
2051 void EmitDebugInfo() const {
2052 // Start debug info section.
2053 Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
2055 CompileUnit *Unit = GetBaseCompileUnit();
2056 DIE *Die = Unit->getDie();
2057 // Emit the compile units header.
2058 EmitLabel("info_begin", Unit->getID());
2059 // Emit size of content not including length itself
2060 unsigned ContentSize = Die->getSize() +
2061 sizeof(int16_t) + // DWARF version number
2062 sizeof(int32_t) + // Offset Into Abbrev. Section
2063 sizeof(int8_t) + // Pointer Size (in bytes)
2064 sizeof(int32_t); // FIXME - extra pad for gdb bug.
2066 Asm->EmitInt32(ContentSize); Asm->EOL("Length of Compilation Unit Info");
2067 Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF version number");
2068 EmitDifference("abbrev_begin", 0, "section_abbrev", 0, true);
2069 Asm->EOL("Offset Into Abbrev. Section");
2070 Asm->EmitInt8(TAI->getAddressSize()); Asm->EOL("Address Size (in bytes)");
2073 // FIXME - extra padding for gdb bug.
2074 Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
2075 Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
2076 Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
2077 Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
2078 EmitLabel("info_end", Unit->getID());
2083 /// EmitAbbreviations - Emit the abbreviation section.
2085 void EmitAbbreviations() const {
2086 // Check to see if it is worth the effort.
2087 if (!Abbreviations.empty()) {
2088 // Start the debug abbrev section.
2089 Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection());
2091 EmitLabel("abbrev_begin", 0);
2093 // For each abbrevation.
2094 for (unsigned i = 0, N = Abbreviations.size(); i < N; ++i) {
2095 // Get abbreviation data
2096 const DIEAbbrev *Abbrev = Abbreviations[i];
2098 // Emit the abbrevations code (base 1 index.)
2099 Asm->EmitULEB128Bytes(Abbrev->getNumber());
2100 Asm->EOL("Abbreviation Code");
2102 // Emit the abbreviations data.
2103 Abbrev->Emit(*this);
2108 // Mark end of abbreviations.
2109 Asm->EmitULEB128Bytes(0); Asm->EOL("EOM(3)");
2111 EmitLabel("abbrev_end", 0);
2117 /// EmitDebugLines - Emit source line information.
2119 void EmitDebugLines() const {
2120 // Minimum line delta, thus ranging from -10..(255-10).
2121 const int MinLineDelta = -(DW_LNS_fixed_advance_pc + 1);
2122 // Maximum line delta, thus ranging from -10..(255-10).
2123 const int MaxLineDelta = 255 + MinLineDelta;
2125 // Start the dwarf line section.
2126 Asm->SwitchToDataSection(TAI->getDwarfLineSection());
2128 // Construct the section header.
2130 EmitDifference("line_end", 0, "line_begin", 0, true);
2131 Asm->EOL("Length of Source Line Info");
2132 EmitLabel("line_begin", 0);
2134 Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF version number");
2136 EmitDifference("line_prolog_end", 0, "line_prolog_begin", 0, true);
2137 Asm->EOL("Prolog Length");
2138 EmitLabel("line_prolog_begin", 0);
2140 Asm->EmitInt8(1); Asm->EOL("Minimum Instruction Length");
2142 Asm->EmitInt8(1); Asm->EOL("Default is_stmt_start flag");
2144 Asm->EmitInt8(MinLineDelta); Asm->EOL("Line Base Value (Special Opcodes)");
2146 Asm->EmitInt8(MaxLineDelta); Asm->EOL("Line Range Value (Special Opcodes)");
2148 Asm->EmitInt8(-MinLineDelta); Asm->EOL("Special Opcode Base");
2150 // Line number standard opcode encodings argument count
2151 Asm->EmitInt8(0); Asm->EOL("DW_LNS_copy arg count");
2152 Asm->EmitInt8(1); Asm->EOL("DW_LNS_advance_pc arg count");
2153 Asm->EmitInt8(1); Asm->EOL("DW_LNS_advance_line arg count");
2154 Asm->EmitInt8(1); Asm->EOL("DW_LNS_set_file arg count");
2155 Asm->EmitInt8(1); Asm->EOL("DW_LNS_set_column arg count");
2156 Asm->EmitInt8(0); Asm->EOL("DW_LNS_negate_stmt arg count");
2157 Asm->EmitInt8(0); Asm->EOL("DW_LNS_set_basic_block arg count");
2158 Asm->EmitInt8(0); Asm->EOL("DW_LNS_const_add_pc arg count");
2159 Asm->EmitInt8(1); Asm->EOL("DW_LNS_fixed_advance_pc arg count");
2161 const UniqueVector<std::string> &Directories = MMI->getDirectories();
2162 const UniqueVector<SourceFileInfo>
2163 &SourceFiles = MMI->getSourceFiles();
2165 // Emit directories.
2166 for (unsigned DirectoryID = 1, NDID = Directories.size();
2167 DirectoryID <= NDID; ++DirectoryID) {
2168 Asm->EmitString(Directories[DirectoryID]); Asm->EOL("Directory");
2170 Asm->EmitInt8(0); Asm->EOL("End of directories");
2173 for (unsigned SourceID = 1, NSID = SourceFiles.size();
2174 SourceID <= NSID; ++SourceID) {
2175 const SourceFileInfo &SourceFile = SourceFiles[SourceID];
2176 Asm->EmitString(SourceFile.getName());
2178 Asm->EmitULEB128Bytes(SourceFile.getDirectoryID());
2179 Asm->EOL("Directory #");
2180 Asm->EmitULEB128Bytes(0);
2181 Asm->EOL("Mod date");
2182 Asm->EmitULEB128Bytes(0);
2183 Asm->EOL("File size");
2185 Asm->EmitInt8(0); Asm->EOL("End of files");
2187 EmitLabel("line_prolog_end", 0);
2189 // A sequence for each text section.
2190 for (unsigned j = 0, M = SectionSourceLines.size(); j < M; ++j) {
2191 // Isolate current sections line info.
2192 const std::vector<SourceLineInfo> &LineInfos = SectionSourceLines[j];
2194 Asm->EOL(std::string("Section ") + SectionMap[j + 1]);
2196 // Dwarf assumes we start with first line of first source file.
2197 unsigned Source = 1;
2200 // Construct rows of the address, source, line, column matrix.
2201 for (unsigned i = 0, N = LineInfos.size(); i < N; ++i) {
2202 const SourceLineInfo &LineInfo = LineInfos[i];
2203 unsigned LabelID = MMI->MappedLabel(LineInfo.getLabelID());
2204 if (!LabelID) continue;
2206 unsigned SourceID = LineInfo.getSourceID();
2207 const SourceFileInfo &SourceFile = SourceFiles[SourceID];
2208 unsigned DirectoryID = SourceFile.getDirectoryID();
2209 Asm->EOL(Directories[DirectoryID]
2210 + SourceFile.getName()
2212 + utostr_32(LineInfo.getLine()));
2214 // Define the line address.
2215 Asm->EmitInt8(0); Asm->EOL("Extended Op");
2216 Asm->EmitInt8(TAI->getAddressSize() + 1); Asm->EOL("Op size");
2217 Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
2218 EmitReference("label", LabelID); Asm->EOL("Location label");
2220 // If change of source, then switch to the new source.
2221 if (Source != LineInfo.getSourceID()) {
2222 Source = LineInfo.getSourceID();
2223 Asm->EmitInt8(DW_LNS_set_file); Asm->EOL("DW_LNS_set_file");
2224 Asm->EmitULEB128Bytes(Source); Asm->EOL("New Source");
2227 // If change of line.
2228 if (Line != LineInfo.getLine()) {
2229 // Determine offset.
2230 int Offset = LineInfo.getLine() - Line;
2231 int Delta = Offset - MinLineDelta;
2234 Line = LineInfo.getLine();
2236 // If delta is small enough and in range...
2237 if (Delta >= 0 && Delta < (MaxLineDelta - 1)) {
2238 // ... then use fast opcode.
2239 Asm->EmitInt8(Delta - MinLineDelta); Asm->EOL("Line Delta");
2241 // ... otherwise use long hand.
2242 Asm->EmitInt8(DW_LNS_advance_line); Asm->EOL("DW_LNS_advance_line");
2243 Asm->EmitSLEB128Bytes(Offset); Asm->EOL("Line Offset");
2244 Asm->EmitInt8(DW_LNS_copy); Asm->EOL("DW_LNS_copy");
2247 // Copy the previous row (different address or source)
2248 Asm->EmitInt8(DW_LNS_copy); Asm->EOL("DW_LNS_copy");
2252 // Define last address of section.
2253 Asm->EmitInt8(0); Asm->EOL("Extended Op");
2254 Asm->EmitInt8(TAI->getAddressSize() + 1); Asm->EOL("Op size");
2255 Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
2256 EmitReference("section_end", j + 1); Asm->EOL("Section end label");
2258 // Mark end of matrix.
2259 Asm->EmitInt8(0); Asm->EOL("DW_LNE_end_sequence");
2260 Asm->EmitULEB128Bytes(1); Asm->EOL();
2261 Asm->EmitInt8(1); Asm->EOL();
2264 EmitLabel("line_end", 0);
2269 /// EmitInitialDebugFrame - Emit common frame info into a debug frame section.
2271 void EmitInitialDebugFrame() {
2272 if (!TAI->getDwarfRequiresFrameSection())
2276 Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
2277 TargetFrameInfo::StackGrowsUp ?
2278 TAI->getAddressSize() : -TAI->getAddressSize();
2280 // Start the dwarf frame section.
2281 Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
2283 EmitLabel("frame_common", 0);
2284 EmitDifference("frame_common_end", 0,
2285 "frame_common_begin", 0, true);
2286 Asm->EOL("Length of Common Information Entry");
2288 EmitLabel("frame_common_begin", 0);
2289 Asm->EmitInt32((int)DW_CIE_ID);
2290 Asm->EOL("CIE Identifier Tag");
2291 Asm->EmitInt8(DW_CIE_VERSION);
2292 Asm->EOL("CIE Version");
2293 Asm->EmitString("");
2294 Asm->EOL("CIE Augmentation");
2295 Asm->EmitULEB128Bytes(1);
2296 Asm->EOL("CIE Code Alignment Factor");
2297 Asm->EmitSLEB128Bytes(stackGrowth);
2298 Asm->EOL("CIE Data Alignment Factor");
2299 Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister()));
2300 Asm->EOL("CIE RA Column");
2302 std::vector<MachineMove> Moves;
2303 RI->getInitialFrameState(Moves);
2304 EmitFrameMoves(NULL, 0, Moves);
2306 Asm->EmitAlignment(2);
2307 EmitLabel("frame_common_end", 0);
2312 /// EmitFunctionDebugFrame - Emit per function frame info into a debug frame
2314 void EmitFunctionDebugFrame() {
2315 if (!TAI->getDwarfRequiresFrameSection())
2318 // Start the dwarf frame section.
2319 Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
2321 EmitDifference("frame_end", SubprogramCount,
2322 "frame_begin", SubprogramCount, true);
2323 Asm->EOL("Length of Frame Information Entry");
2325 EmitLabel("frame_begin", SubprogramCount);
2327 EmitDifference("frame_common_begin", 0, "section_frame", 0, true);
2328 Asm->EOL("FDE CIE offset");
2330 EmitReference("func_begin", SubprogramCount);
2331 Asm->EOL("FDE initial location");
2332 EmitDifference("func_end", SubprogramCount,
2333 "func_begin", SubprogramCount);
2334 Asm->EOL("FDE address range");
2336 std::vector<MachineMove> &Moves = MMI->getFrameMoves();
2338 EmitFrameMoves("func_begin", SubprogramCount, Moves);
2340 Asm->EmitAlignment(2);
2341 EmitLabel("frame_end", SubprogramCount);
2346 /// EmitDebugPubNames - Emit visible names into a debug pubnames section.
2348 void EmitDebugPubNames() {
2349 // Start the dwarf pubnames section.
2350 Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection());
2352 CompileUnit *Unit = GetBaseCompileUnit();
2354 EmitDifference("pubnames_end", Unit->getID(),
2355 "pubnames_begin", Unit->getID(), true);
2356 Asm->EOL("Length of Public Names Info");
2358 EmitLabel("pubnames_begin", Unit->getID());
2360 Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF Version");
2362 EmitDifference("info_begin", Unit->getID(), "section_info", 0, true);
2363 Asm->EOL("Offset of Compilation Unit Info");
2365 EmitDifference("info_end", Unit->getID(), "info_begin", Unit->getID(),true);
2366 Asm->EOL("Compilation Unit Length");
2368 std::map<std::string, DIE *> &Globals = Unit->getGlobals();
2370 for (std::map<std::string, DIE *>::iterator GI = Globals.begin(),
2373 const std::string &Name = GI->first;
2374 DIE * Entity = GI->second;
2376 Asm->EmitInt32(Entity->getOffset()); Asm->EOL("DIE offset");
2377 Asm->EmitString(Name); Asm->EOL("External Name");
2380 Asm->EmitInt32(0); Asm->EOL("End Mark");
2381 EmitLabel("pubnames_end", Unit->getID());
2386 /// EmitDebugStr - Emit visible names into a debug str section.
2388 void EmitDebugStr() {
2389 // Check to see if it is worth the effort.
2390 if (!StringPool.empty()) {
2391 // Start the dwarf str section.
2392 Asm->SwitchToDataSection(TAI->getDwarfStrSection());
2394 // For each of strings in the string pool.
2395 for (unsigned StringID = 1, N = StringPool.size();
2396 StringID <= N; ++StringID) {
2397 // Emit a label for reference from debug information entries.
2398 EmitLabel("string", StringID);
2399 // Emit the string itself.
2400 const std::string &String = StringPool[StringID];
2401 Asm->EmitString(String); Asm->EOL();
2408 /// EmitDebugLoc - Emit visible names into a debug loc section.
2410 void EmitDebugLoc() {
2411 // Start the dwarf loc section.
2412 Asm->SwitchToDataSection(TAI->getDwarfLocSection());
2417 /// EmitDebugARanges - Emit visible names into a debug aranges section.
2419 void EmitDebugARanges() {
2420 // Start the dwarf aranges section.
2421 Asm->SwitchToDataSection(TAI->getDwarfARangesSection());
2425 CompileUnit *Unit = GetBaseCompileUnit();
2427 // Don't include size of length
2428 Asm->EmitInt32(0x1c); Asm->EOL("Length of Address Ranges Info");
2430 Asm->EmitInt16(DWARF_VERSION); Asm->EOL("Dwarf Version");
2432 EmitReference("info_begin", Unit->getID());
2433 Asm->EOL("Offset of Compilation Unit Info");
2435 Asm->EmitInt8(TAI->getAddressSize()); Asm->EOL("Size of Address");
2437 Asm->EmitInt8(0); Asm->EOL("Size of Segment Descriptor");
2439 Asm->EmitInt16(0); Asm->EOL("Pad (1)");
2440 Asm->EmitInt16(0); Asm->EOL("Pad (2)");
2443 EmitReference("text_begin", 0); Asm->EOL("Address");
2444 EmitDifference("text_end", 0, "text_begin", 0, true); Asm->EOL("Length");
2446 Asm->EmitInt32(0); Asm->EOL("EOM (1)");
2447 Asm->EmitInt32(0); Asm->EOL("EOM (2)");
2453 /// EmitDebugRanges - Emit visible names into a debug ranges section.
2455 void EmitDebugRanges() {
2456 // Start the dwarf ranges section.
2457 Asm->SwitchToDataSection(TAI->getDwarfRangesSection());
2462 /// EmitDebugMacInfo - Emit visible names into a debug macinfo section.
2464 void EmitDebugMacInfo() {
2465 // Start the dwarf macinfo section.
2466 Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection());
2471 /// ConstructCompileUnitDIEs - Create a compile unit DIE for each source and
2473 void ConstructCompileUnitDIEs() {
2474 const UniqueVector<CompileUnitDesc *> CUW = MMI->getCompileUnits();
2476 for (unsigned i = 1, N = CUW.size(); i <= N; ++i) {
2477 unsigned ID = MMI->RecordSource(CUW[i]);
2478 CompileUnit *Unit = NewCompileUnit(CUW[i], ID);
2479 CompileUnits.push_back(Unit);
2483 /// ConstructGlobalDIEs - Create DIEs for each of the externally visible
2484 /// global variables.
2485 void ConstructGlobalDIEs() {
2486 std::vector<GlobalVariableDesc *> GlobalVariables =
2487 MMI->getAnchoredDescriptors<GlobalVariableDesc>(*M);
2489 for (unsigned i = 0, N = GlobalVariables.size(); i < N; ++i) {
2490 GlobalVariableDesc *GVD = GlobalVariables[i];
2491 NewGlobalVariable(GVD);
2495 /// ConstructSubprogramDIEs - Create DIEs for each of the externally visible
2497 void ConstructSubprogramDIEs() {
2498 std::vector<SubprogramDesc *> Subprograms =
2499 MMI->getAnchoredDescriptors<SubprogramDesc>(*M);
2501 for (unsigned i = 0, N = Subprograms.size(); i < N; ++i) {
2502 SubprogramDesc *SPD = Subprograms[i];
2508 //===--------------------------------------------------------------------===//
2509 // Main entry points.
2511 DwarfDebug(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
2514 , AbbreviationsSet(InitAbbreviationsSetSize)
2516 , ValuesSet(InitValuesSetSize)
2521 , SectionSourceLines()
2526 virtual ~DwarfDebug() {
2527 for (unsigned i = 0, N = CompileUnits.size(); i < N; ++i)
2528 delete CompileUnits[i];
2529 for (unsigned j = 0, M = Values.size(); j < M; ++j)
2533 /// SetModuleInfo - Set machine module information when it's known that pass
2534 /// manager has created it. Set by the target AsmPrinter.
2535 void SetModuleInfo(MachineModuleInfo *mmi) {
2536 // Make sure initial declarations are made.
2537 if (!MMI && mmi->hasDebugInfo()) {
2541 // Emit initial sections
2544 // Create all the compile unit DIEs.
2545 ConstructCompileUnitDIEs();
2547 // Create DIEs for each of the externally visible global variables.
2548 ConstructGlobalDIEs();
2550 // Create DIEs for each of the externally visible subprograms.
2551 ConstructSubprogramDIEs();
2553 // Prime section data.
2554 SectionMap.insert(TAI->getTextSection());
2558 /// BeginModule - Emit all Dwarf sections that should come prior to the
2560 void BeginModule(Module *M) {
2563 if (!ShouldEmitDwarf()) return;
2566 /// EndModule - Emit all Dwarf sections that should come after the content.
2569 if (!ShouldEmitDwarf()) return;
2571 // Standard sections final addresses.
2572 Asm->SwitchToTextSection(TAI->getTextSection());
2573 EmitLabel("text_end", 0);
2574 Asm->SwitchToDataSection(TAI->getDataSection());
2575 EmitLabel("data_end", 0);
2577 // End text sections.
2578 for (unsigned i = 1, N = SectionMap.size(); i <= N; ++i) {
2579 Asm->SwitchToTextSection(SectionMap[i].c_str());
2580 EmitLabel("section_end", i);
2583 // Compute DIE offsets and sizes.
2586 // Emit all the DIEs into a debug info section
2589 // Corresponding abbreviations into a abbrev section.
2590 EmitAbbreviations();
2592 // Emit source line correspondence into a debug line section.
2595 // Emit info into a debug pubnames section.
2596 EmitDebugPubNames();
2598 // Emit info into a debug str section.
2601 // Emit info into a debug loc section.
2604 // Emit info into a debug aranges section.
2607 // Emit info into a debug ranges section.
2610 // Emit info into a debug macinfo section.
2614 /// BeginFunction - Gather pre-function debug information. Assumes being
2615 /// emitted immediately after the function entry point.
2616 void BeginFunction(MachineFunction *MF) {
2619 if (!ShouldEmitDwarf()) return;
2621 // Begin accumulating function debug information.
2622 MMI->BeginFunction(MF);
2624 // Assumes in correct section after the entry point.
2625 EmitLabel("func_begin", ++SubprogramCount);
2628 /// EndFunction - Gather and emit post-function debug information.
2630 void EndFunction() {
2631 if (!ShouldEmitDwarf()) return;
2633 // Define end label for subprogram.
2634 EmitLabel("func_end", SubprogramCount);
2636 // Get function line info.
2637 const std::vector<SourceLineInfo> &LineInfos = MMI->getSourceLines();
2639 if (!LineInfos.empty()) {
2640 // Get section line info.
2641 unsigned ID = SectionMap.insert(Asm->CurrentSection);
2642 if (SectionSourceLines.size() < ID) SectionSourceLines.resize(ID);
2643 std::vector<SourceLineInfo> &SectionLineInfos = SectionSourceLines[ID-1];
2644 // Append the function info to section info.
2645 SectionLineInfos.insert(SectionLineInfos.end(),
2646 LineInfos.begin(), LineInfos.end());
2649 // Construct scopes for subprogram.
2650 ConstructRootScope(MMI->getRootScope());
2652 // Emit function frame information.
2653 EmitFunctionDebugFrame();
2657 //===----------------------------------------------------------------------===//
2658 /// DwarfException - Emits Dwarf exception handling directives.
2660 class DwarfException : public Dwarf {
2664 /// didInitial - Flag to indicate if initial emission has been done.
2668 /// shouldEmit - Flag to indicate if debug information should be emitted.
2672 /// FuncCPPPersonality - C++ persoanlity function.
2674 Function *FuncCPPPersonality;
2676 /// EmitCommonEHFrame - Emit the common eh unwind frame.
2678 void EmitCommonEHFrame() {
2680 if (didInitial) return;
2683 // If there is a personality present then we need to indicate that
2684 // in the common eh frame.
2685 Function *Personality = FuncCPPPersonality;
2687 // Size and sign of stack growth.
2689 Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
2690 TargetFrameInfo::StackGrowsUp ?
2691 TAI->getAddressSize() : -TAI->getAddressSize();
2693 // Begin eh frame section.
2694 Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
2696 EmitLabel("section_eh_frame", 0);
2698 // Define base labels.
2699 EmitLabel("eh_frame_common", 0);
2701 // Define the eh frame length.
2702 EmitDifference("eh_frame_common_end", 0,
2703 "eh_frame_common_begin", 0, true);
2704 Asm->EOL("Length of Common Information Entry");
2707 EmitLabel("eh_frame_common_begin", 0);
2708 Asm->EmitInt32((int)0);
2709 Asm->EOL("CIE Identifier Tag");
2710 Asm->EmitInt8(DW_CIE_VERSION);
2711 Asm->EOL("CIE Version");
2713 // The personality presence indicates that language specific information
2714 // will show up in the eh frame.
2715 Asm->EmitString(Personality ? "zPLR" : "zR");
2716 Asm->EOL("CIE Augmentation");
2718 // Round out reader.
2719 Asm->EmitULEB128Bytes(1);
2720 Asm->EOL("CIE Code Alignment Factor");
2721 Asm->EmitSLEB128Bytes(stackGrowth);
2722 Asm->EOL("CIE Data Alignment Factor");
2723 Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister()));
2724 Asm->EOL("CIE RA Column");
2726 // If there is a personality, we need to indicate the functions location.
2728 Asm->EmitULEB128Bytes(7);
2729 Asm->EOL("Augmentation Size");
2730 Asm->EmitInt8(DW_EH_PE_indirect |
2733 Asm->EOL("Personality (indirect pcrel sdata4)");
2735 O << TAI->getData32bitsDirective();
2736 Asm->EmitExternalGlobal((const GlobalVariable *)(Personality));
2737 O << "-" << TAI->getPCSymbol();
2738 Asm->EOL("Personality");
2740 Asm->EmitULEB128Bytes(DW_EH_PE_pcrel);
2741 Asm->EOL("LSDA Encoding (pcrel)");
2742 Asm->EmitULEB128Bytes(DW_EH_PE_pcrel);
2743 Asm->EOL("FDE Encoding (pcrel)");
2745 Asm->EmitULEB128Bytes(1);
2746 Asm->EOL("Augmentation Size");
2747 Asm->EmitULEB128Bytes(DW_EH_PE_pcrel);
2748 Asm->EOL("FDE Encoding (pcrel)");
2751 // Indicate locations of general callee saved registers in frame.
2752 std::vector<MachineMove> Moves;
2753 RI->getInitialFrameState(Moves);
2754 EmitFrameMoves(NULL, 0, Moves);
2756 Asm->EmitAlignment(2);
2757 EmitLabel("eh_frame_common_end", 0);
2762 /// EmitEHFrame - Emit initial exception information.
2764 void EmitEHFrame() {
2765 // If there is a personality present then we need to indicate that
2766 // in the common eh frame.
2767 Function *Personality = FuncCPPPersonality;
2768 // Function *Personality = MMI->getPersonality();
2769 MachineFrameInfo *MFI = MF->getFrameInfo();
2771 Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
2773 // Externally visible entry into the functions eh frame info.
2774 if (const char *GlobalDirective = TAI->getGlobalDirective())
2775 O << GlobalDirective << getAsm()->CurrentFnName << ".eh\n";
2777 // If there are no calls then you can't unwind.
2778 if (!MFI->hasCalls()) {
2779 O << getAsm()->CurrentFnName << ".eh = 0\n";
2781 O << getAsm()->CurrentFnName << ".eh:\n";
2784 EmitDifference("eh_frame_end", SubprogramCount,
2785 "eh_frame_begin", SubprogramCount, true);
2786 Asm->EOL("Length of Frame Information Entry");
2788 EmitLabel("eh_frame_begin", SubprogramCount);
2790 EmitDifference("eh_frame_begin", SubprogramCount,
2791 "section_eh_frame", 0, true);
2792 Asm->EOL("FDE CIE offset");
2794 EmitReference("eh_func_begin", SubprogramCount, true);
2795 Asm->EOL("FDE initial location");
2796 EmitDifference("eh_func_end", SubprogramCount,
2797 "eh_func_begin", SubprogramCount);
2798 Asm->EOL("FDE address range");
2800 // If there is a personality and landing pads then point to the language
2801 // specific data area in the exception table.
2803 Asm->EmitULEB128Bytes(4);
2804 Asm->EOL("Augmentation size");
2806 if (!MMI->getLandingPads().empty()) {
2807 EmitReference("exception", SubprogramCount, true);
2808 } else if(TAI->getAddressSize() == 8) {
2809 Asm->EmitInt64((int)0);
2811 Asm->EmitInt32((int)0);
2813 Asm->EOL("Language Specific Data Area");
2815 Asm->EmitULEB128Bytes(0);
2816 Asm->EOL("Augmentation size");
2819 // Indicate locations of function specific callee saved registers in
2821 std::vector<MachineMove> &Moves = MMI->getFrameMoves();
2822 EmitFrameMoves("eh_func_begin", SubprogramCount, Moves);
2824 Asm->EmitAlignment(2);
2825 EmitLabel("eh_frame_end", SubprogramCount);
2828 if (const char *UsedDirective = TAI->getUsedDirective())
2829 O << UsedDirective << getAsm()->CurrentFnName << ".eh\n\n";
2832 /// EmitExceptionTable - Emit landpads and actions.
2834 /// The general organization of the table is complex, but the basic concepts
2835 /// are easy. First there is a header which describes the location and
2836 /// organization of the three components that follow.
2837 /// 1. The landing pad site information describes the range of code covered
2838 /// by the try. In our case it's an accumulation of the ranges covered
2839 /// by the invokes in the try. There is also a reference to the landing
2840 /// pad that handles the exception once processed. Finally an index into
2841 /// the actions table.
2842 /// 2. The action table, in our case, is composed of pairs of type ids
2843 /// and next action offset. Starting with the action index from the
2844 /// landing pad site, each type Id is checked for a match to the current
2845 /// exception. If it matches then the exception and type id are passed
2846 /// on to the landing pad. Otherwise the next action is looked up. This
2847 /// chain is terminated with a next action of zero. If no type id is
2848 /// found the the frame is unwound and handling continues.
2849 /// 3. Type id table contains references to all the C++ typeinfo for all
2850 /// catches in the function. This tables is reversed indexed base 1.
2851 void EmitExceptionTable() {
2852 // Map all labels and get rid of any dead landing pads.
2853 MMI->TidyLandingPads();
2855 const std::vector<GlobalVariable *> &TypeInfos = MMI->getTypeInfos();
2856 const std::vector<LandingPadInfo> &LandingPads = MMI->getLandingPads();
2857 if (LandingPads.empty()) return;
2859 // FIXME - Should fold actions for multiple landing pads.
2861 // Gather first action index for each landing pad site.
2862 SmallVector<unsigned, 8> Actions;
2864 // Compute sizes for exception table.
2865 unsigned SizeHeader = sizeof(int8_t) + // LPStart format
2866 sizeof(int8_t) + // TType format
2867 sizeof(int8_t) + // TType base offset (NEED ULEB128)
2868 sizeof(int8_t) + // Call site format
2869 sizeof(int8_t); // Call-site table length
2870 unsigned SizeSites = 0;
2871 unsigned SizeActions = 0;
2873 // Look at each landing pad site to compute size. We need the size of each
2874 // landing pad site info and the size of the landing pad's actions.
2875 for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
2876 const LandingPadInfo &LandingPad = LandingPads[i];
2877 unsigned SizeSiteActions = 0;
2878 const std::vector<unsigned> &TypeIds = LandingPad.TypeIds;
2879 unsigned SizeAction = 0;
2881 // Gather the action sizes
2882 for (unsigned j = 0, M = TypeIds.size(); j != M; ++j) {
2883 unsigned TypeID = TypeIds[i];
2884 unsigned SizeTypeID = Asm->SizeULEB128(TypeID);
2885 signed Action = j ? -(SizeAction + SizeTypeID) : 0;
2886 SizeAction = SizeTypeID + Asm->SizeSLEB128(Action);
2887 SizeSiteActions += SizeAction;
2890 // Record the first action of the landing pad site.
2891 signed FirstAction = SizeActions + SizeSiteActions - SizeAction + 1;
2892 Actions.push_back(FirstAction);
2894 // Compute this sites contribution to size.
2895 SizeActions += SizeSiteActions;
2896 SizeSites += sizeof(int32_t) + // Site start.
2897 sizeof(int32_t) + // Site length.
2898 sizeof(int32_t) + // Landing pad.
2899 Asm->SizeULEB128(FirstAction); // Action.
2903 unsigned SizeTypes = TypeInfos.size() * TAI->getAddressSize();
2904 unsigned SizePreType = SizeHeader + SizeSites + SizeActions;
2905 unsigned SizeAlign = (4 - SizePreType) & 3;
2906 unsigned TypeOffset = SizePreType +
2909 sizeof(int8_t) - // LPStart format
2910 sizeof(int8_t) - // TType format
2911 sizeof(int8_t); // TType base offset (NEED ULEB128)
2913 // Begin the exception table.
2914 Asm->SwitchToDataSection(TAI->getDwarfExceptionSection());
2915 O << "GCC_except_table" << SubprogramCount << ":\n";
2916 EmitLabel("exception", SubprogramCount);
2919 Asm->EmitInt8(DW_EH_PE_omit);
2920 Asm->EOL("LPStart format (DW_EH_PE_omit)");
2921 Asm->EmitInt8(DW_EH_PE_absptr);
2922 Asm->EOL("TType format (DW_EH_PE_absptr)");
2923 Asm->EmitULEB128Bytes(TypeOffset);
2924 Asm->EOL("TType base offset");
2925 Asm->EmitInt8(DW_EH_PE_udata4);
2926 Asm->EOL("Call site format (DW_EH_PE_udata4)");
2927 Asm->EmitULEB128Bytes(SizeSites);
2928 Asm->EOL("Call-site table length");
2930 // Emit the landng pad site information.
2931 for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
2932 const LandingPadInfo &LandingPad = LandingPads[i];
2933 EmitDifference("label", LandingPad.BeginLabel,
2934 "eh_func_begin", SubprogramCount);
2935 Asm->EOL("Region start");
2937 EmitDifference("label", LandingPad.EndLabel,
2938 "label", LandingPad.BeginLabel);
2939 Asm->EOL("Region length");
2941 EmitDifference("label", LandingPad.LandingPadLabel,
2942 "eh_func_begin", SubprogramCount);
2943 Asm->EOL("Landing pad");
2945 Asm->EmitULEB128Bytes(Actions[i]);
2949 // Emit the actions.
2950 for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
2951 const LandingPadInfo &LandingPad = LandingPads[i];
2952 const std::vector<unsigned> &TypeIds = LandingPad.TypeIds;
2953 unsigned SizeAction = 0;
2955 for (unsigned j = 0, M = TypeIds.size(); j < M; ++j) {
2956 unsigned TypeID = TypeIds[j];
2957 unsigned SizeTypeID = Asm->SizeULEB128(TypeID);
2958 Asm->EmitSLEB128Bytes(TypeID);
2959 Asm->EOL("TypeInfo index");
2960 signed Action = j ? -(SizeAction + SizeTypeID) : 0;
2961 SizeAction = SizeTypeID + Asm->SizeSLEB128(Action);
2962 Asm->EmitSLEB128Bytes(Action);
2963 Asm->EOL("Next action");
2967 // Emit the type ids.
2968 Asm->EmitAlignment(2);
2969 for (unsigned M = TypeInfos.size(); M; --M) {
2970 GlobalVariable *GV = TypeInfos[M - 1];
2972 if (TAI->getAddressSize() == sizeof(int32_t))
2973 O << TAI->getData32bitsDirective();
2975 O << TAI->getData64bitsDirective();
2978 O << Asm->getGlobalLinkName(GV);
2982 Asm->EOL("TypeInfo");
2988 //===--------------------------------------------------------------------===//
2989 // Main entry points.
2991 DwarfException(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
2995 , FuncCPPPersonality(NULL)
2998 virtual ~DwarfException() {}
3000 /// SetModuleInfo - Set machine module information when it's known that pass
3001 /// manager has created it. Set by the target AsmPrinter.
3002 void SetModuleInfo(MachineModuleInfo *mmi) {
3006 /// BeginModule - Emit all exception information that should come prior to the
3008 void BeginModule(Module *M) {
3010 FuncCPPPersonality = M->getFunction("__gxx_personality_v0");
3013 /// EndModule - Emit all exception information that should come after the
3018 /// BeginFunction - Gather pre-function exception information. Assumes being
3019 /// emitted immediately after the function entry point.
3020 void BeginFunction(MachineFunction *MF) {
3024 ExceptionHandling &&
3025 TAI->getSupportsExceptionHandling()) {
3027 // Assumes in correct section after the entry point.
3028 EmitLabel("eh_func_begin", ++SubprogramCount);
3032 /// EndFunction - Gather and emit post-function exception information.
3034 void EndFunction() {
3035 if (!shouldEmit) return;
3037 EmitLabel("eh_func_end", SubprogramCount);
3038 EmitExceptionTable();
3039 EmitCommonEHFrame();
3044 } // End of namespace llvm
3046 //===----------------------------------------------------------------------===//
3048 /// Emit - Print the abbreviation using the specified Dwarf writer.
3050 void DIEAbbrev::Emit(const DwarfDebug &DD) const {
3051 // Emit its Dwarf tag type.
3052 DD.getAsm()->EmitULEB128Bytes(Tag);
3053 DD.getAsm()->EOL(TagString(Tag));
3055 // Emit whether it has children DIEs.
3056 DD.getAsm()->EmitULEB128Bytes(ChildrenFlag);
3057 DD.getAsm()->EOL(ChildrenString(ChildrenFlag));
3059 // For each attribute description.
3060 for (unsigned i = 0, N = Data.size(); i < N; ++i) {
3061 const DIEAbbrevData &AttrData = Data[i];
3063 // Emit attribute type.
3064 DD.getAsm()->EmitULEB128Bytes(AttrData.getAttribute());
3065 DD.getAsm()->EOL(AttributeString(AttrData.getAttribute()));
3068 DD.getAsm()->EmitULEB128Bytes(AttrData.getForm());
3069 DD.getAsm()->EOL(FormEncodingString(AttrData.getForm()));
3072 // Mark end of abbreviation.
3073 DD.getAsm()->EmitULEB128Bytes(0); DD.getAsm()->EOL("EOM(1)");
3074 DD.getAsm()->EmitULEB128Bytes(0); DD.getAsm()->EOL("EOM(2)");
3078 void DIEAbbrev::print(std::ostream &O) {
3079 O << "Abbreviation @"
3080 << std::hex << (intptr_t)this << std::dec
3084 << ChildrenString(ChildrenFlag)
3087 for (unsigned i = 0, N = Data.size(); i < N; ++i) {
3089 << AttributeString(Data[i].getAttribute())
3091 << FormEncodingString(Data[i].getForm())
3095 void DIEAbbrev::dump() { print(cerr); }
3098 //===----------------------------------------------------------------------===//
3101 void DIEValue::dump() {
3106 //===----------------------------------------------------------------------===//
3108 /// EmitValue - Emit integer of appropriate size.
3110 void DIEInteger::EmitValue(const DwarfDebug &DD, unsigned Form) const {
3112 case DW_FORM_flag: // Fall thru
3113 case DW_FORM_ref1: // Fall thru
3114 case DW_FORM_data1: DD.getAsm()->EmitInt8(Integer); break;
3115 case DW_FORM_ref2: // Fall thru
3116 case DW_FORM_data2: DD.getAsm()->EmitInt16(Integer); break;
3117 case DW_FORM_ref4: // Fall thru
3118 case DW_FORM_data4: DD.getAsm()->EmitInt32(Integer); break;
3119 case DW_FORM_ref8: // Fall thru
3120 case DW_FORM_data8: DD.getAsm()->EmitInt64(Integer); break;
3121 case DW_FORM_udata: DD.getAsm()->EmitULEB128Bytes(Integer); break;
3122 case DW_FORM_sdata: DD.getAsm()->EmitSLEB128Bytes(Integer); break;
3123 default: assert(0 && "DIE Value form not supported yet"); break;
3127 /// SizeOf - Determine size of integer value in bytes.
3129 unsigned DIEInteger::SizeOf(const DwarfDebug &DD, unsigned Form) const {
3131 case DW_FORM_flag: // Fall thru
3132 case DW_FORM_ref1: // Fall thru
3133 case DW_FORM_data1: return sizeof(int8_t);
3134 case DW_FORM_ref2: // Fall thru
3135 case DW_FORM_data2: return sizeof(int16_t);
3136 case DW_FORM_ref4: // Fall thru
3137 case DW_FORM_data4: return sizeof(int32_t);
3138 case DW_FORM_ref8: // Fall thru
3139 case DW_FORM_data8: return sizeof(int64_t);
3140 case DW_FORM_udata: return DD.getAsm()->SizeULEB128(Integer);
3141 case DW_FORM_sdata: return DD.getAsm()->SizeSLEB128(Integer);
3142 default: assert(0 && "DIE Value form not supported yet"); break;
3147 //===----------------------------------------------------------------------===//
3149 /// EmitValue - Emit string value.
3151 void DIEString::EmitValue(const DwarfDebug &DD, unsigned Form) const {
3152 DD.getAsm()->EmitString(String);
3155 //===----------------------------------------------------------------------===//
3157 /// EmitValue - Emit label value.
3159 void DIEDwarfLabel::EmitValue(const DwarfDebug &DD, unsigned Form) const {
3160 DD.EmitReference(Label);
3163 /// SizeOf - Determine size of label value in bytes.
3165 unsigned DIEDwarfLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
3166 return DD.getTargetAsmInfo()->getAddressSize();
3169 //===----------------------------------------------------------------------===//
3171 /// EmitValue - Emit label value.
3173 void DIEObjectLabel::EmitValue(const DwarfDebug &DD, unsigned Form) const {
3174 DD.EmitReference(Label);
3177 /// SizeOf - Determine size of label value in bytes.
3179 unsigned DIEObjectLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
3180 return DD.getTargetAsmInfo()->getAddressSize();
3183 //===----------------------------------------------------------------------===//
3185 /// EmitValue - Emit delta value.
3187 void DIEDelta::EmitValue(const DwarfDebug &DD, unsigned Form) const {
3188 bool IsSmall = Form == DW_FORM_data4;
3189 DD.EmitDifference(LabelHi, LabelLo, IsSmall);
3192 /// SizeOf - Determine size of delta value in bytes.
3194 unsigned DIEDelta::SizeOf(const DwarfDebug &DD, unsigned Form) const {
3195 if (Form == DW_FORM_data4) return 4;
3196 return DD.getTargetAsmInfo()->getAddressSize();
3199 //===----------------------------------------------------------------------===//
3201 /// EmitValue - Emit debug information entry offset.
3203 void DIEntry::EmitValue(const DwarfDebug &DD, unsigned Form) const {
3204 DD.getAsm()->EmitInt32(Entry->getOffset());
3207 //===----------------------------------------------------------------------===//
3209 /// ComputeSize - calculate the size of the block.
3211 unsigned DIEBlock::ComputeSize(DwarfDebug &DD) {
3213 const std::vector<DIEAbbrevData> &AbbrevData = Abbrev.getData();
3215 for (unsigned i = 0, N = Values.size(); i < N; ++i) {
3216 Size += Values[i]->SizeOf(DD, AbbrevData[i].getForm());
3222 /// EmitValue - Emit block data.
3224 void DIEBlock::EmitValue(const DwarfDebug &DD, unsigned Form) const {
3226 case DW_FORM_block1: DD.getAsm()->EmitInt8(Size); break;
3227 case DW_FORM_block2: DD.getAsm()->EmitInt16(Size); break;
3228 case DW_FORM_block4: DD.getAsm()->EmitInt32(Size); break;
3229 case DW_FORM_block: DD.getAsm()->EmitULEB128Bytes(Size); break;
3230 default: assert(0 && "Improper form for block"); break;
3233 const std::vector<DIEAbbrevData> &AbbrevData = Abbrev.getData();
3235 for (unsigned i = 0, N = Values.size(); i < N; ++i) {
3237 Values[i]->EmitValue(DD, AbbrevData[i].getForm());
3241 /// SizeOf - Determine size of block data in bytes.
3243 unsigned DIEBlock::SizeOf(const DwarfDebug &DD, unsigned Form) const {
3245 case DW_FORM_block1: return Size + sizeof(int8_t);
3246 case DW_FORM_block2: return Size + sizeof(int16_t);
3247 case DW_FORM_block4: return Size + sizeof(int32_t);
3248 case DW_FORM_block: return Size + DD.getAsm()->SizeULEB128(Size);
3249 default: assert(0 && "Improper form for block"); break;
3254 //===----------------------------------------------------------------------===//
3255 /// DIE Implementation
3258 for (unsigned i = 0, N = Children.size(); i < N; ++i)
3262 /// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
3264 void DIE::AddSiblingOffset() {
3265 DIEInteger *DI = new DIEInteger(0);
3266 Values.insert(Values.begin(), DI);
3267 Abbrev.AddFirstAttribute(DW_AT_sibling, DW_FORM_ref4);
3270 /// Profile - Used to gather unique data for the value folding set.
3272 void DIE::Profile(FoldingSetNodeID &ID) {
3275 for (unsigned i = 0, N = Children.size(); i < N; ++i)
3276 ID.AddPointer(Children[i]);
3278 for (unsigned j = 0, M = Values.size(); j < M; ++j)
3279 ID.AddPointer(Values[j]);
3283 void DIE::print(std::ostream &O, unsigned IncIndent) {
3284 static unsigned IndentCount = 0;
3285 IndentCount += IncIndent;
3286 const std::string Indent(IndentCount, ' ');
3287 bool isBlock = Abbrev.getTag() == 0;
3292 << "0x" << std::hex << (intptr_t)this << std::dec
3293 << ", Offset: " << Offset
3294 << ", Size: " << Size
3298 << TagString(Abbrev.getTag())
3300 << ChildrenString(Abbrev.getChildrenFlag());
3302 O << "Size: " << Size;
3306 const std::vector<DIEAbbrevData> &Data = Abbrev.getData();
3309 for (unsigned i = 0, N = Data.size(); i < N; ++i) {
3312 O << AttributeString(Data[i].getAttribute());
3314 O << "Blk[" << i << "]";
3317 << FormEncodingString(Data[i].getForm())
3319 Values[i]->print(O);
3324 for (unsigned j = 0, M = Children.size(); j < M; ++j) {
3325 Children[j]->print(O, 4);
3328 if (!isBlock) O << "\n";
3329 IndentCount -= IncIndent;
3337 //===----------------------------------------------------------------------===//
3338 /// DwarfWriter Implementation
3341 DwarfWriter::DwarfWriter(std::ostream &OS, AsmPrinter *A,
3342 const TargetAsmInfo *T) {
3343 DE = new DwarfException(OS, A, T);
3344 DD = new DwarfDebug(OS, A, T);
3347 DwarfWriter::~DwarfWriter() {
3352 /// SetModuleInfo - Set machine module info when it's known that pass manager
3353 /// has created it. Set by the target AsmPrinter.
3354 void DwarfWriter::SetModuleInfo(MachineModuleInfo *MMI) {
3355 DD->SetModuleInfo(MMI);
3356 DE->SetModuleInfo(MMI);
3359 /// BeginModule - Emit all Dwarf sections that should come prior to the
3361 void DwarfWriter::BeginModule(Module *M) {
3366 /// EndModule - Emit all Dwarf sections that should come after the content.
3368 void DwarfWriter::EndModule() {
3373 /// BeginFunction - Gather pre-function debug information. Assumes being
3374 /// emitted immediately after the function entry point.
3375 void DwarfWriter::BeginFunction(MachineFunction *MF) {
3376 DE->BeginFunction(MF);
3377 DD->BeginFunction(MF);
3380 /// EndFunction - Gather and emit post-function debug information.
3382 void DwarfWriter::EndFunction() {
3386 if (MachineModuleInfo *MMI = DD->getMMI() ? DD->getMMI() : DE->getMMI()) {
3387 // Clear function debug information.