1 //===-- llvm/CodeGen/DwarfDebug.cpp - Dwarf Debug Framework ---------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains support for writing dwarf debug info into asm files.
12 //===----------------------------------------------------------------------===//
14 #define DEBUG_TYPE "dwarfdebug"
15 #include "DwarfDebug.h"
16 #include "llvm/Module.h"
17 #include "llvm/CodeGen/MachineFunction.h"
18 #include "llvm/CodeGen/MachineModuleInfo.h"
19 #include "llvm/MC/MCAsmInfo.h"
20 #include "llvm/MC/MCSection.h"
21 #include "llvm/MC/MCStreamer.h"
22 #include "llvm/MC/MCSymbol.h"
23 #include "llvm/Target/Mangler.h"
24 #include "llvm/Target/TargetData.h"
25 #include "llvm/Target/TargetFrameInfo.h"
26 #include "llvm/Target/TargetLoweringObjectFile.h"
27 #include "llvm/Target/TargetRegisterInfo.h"
28 #include "llvm/ADT/STLExtras.h"
29 #include "llvm/ADT/StringExtras.h"
30 #include "llvm/Support/Debug.h"
31 #include "llvm/Support/ErrorHandling.h"
32 #include "llvm/Support/ValueHandle.h"
33 #include "llvm/Support/FormattedStream.h"
34 #include "llvm/Support/Timer.h"
35 #include "llvm/System/Path.h"
38 //===----------------------------------------------------------------------===//
40 /// Configuration values for initial hash set sizes (log2).
42 static const unsigned InitAbbreviationsSetSize = 9; // log2(512)
46 //===----------------------------------------------------------------------===//
47 /// CompileUnit - This dwarf writer support class manages information associate
48 /// with a source file.
50 /// ID - File identifier for source.
54 /// Die - Compile unit debug information entry.
56 const OwningPtr<DIE> CUDie;
58 /// IndexTyDie - An anonymous type for index type. Owned by CUDie.
61 /// GVToDieMap - Tracks the mapping of unit level debug informaton
62 /// variables to debug information entries.
63 /// FIXME : Rename GVToDieMap -> NodeToDieMap
64 DenseMap<MDNode *, DIE *> GVToDieMap;
66 /// GVToDIEEntryMap - Tracks the mapping of unit level debug informaton
67 /// descriptors to debug information entries using a DIEEntry proxy.
69 DenseMap<MDNode *, DIEEntry *> GVToDIEEntryMap;
71 /// Globals - A map of globally visible named entities for this unit.
73 StringMap<DIE*> Globals;
75 /// GlobalTypes - A map of globally visible types for this unit.
77 StringMap<DIE*> GlobalTypes;
80 CompileUnit(unsigned I, DIE *D)
81 : ID(I), CUDie(D), IndexTyDie(0) {}
84 unsigned getID() const { return ID; }
85 DIE* getCUDie() const { return CUDie.get(); }
86 const StringMap<DIE*> &getGlobals() const { return Globals; }
87 const StringMap<DIE*> &getGlobalTypes() const { return GlobalTypes; }
89 /// hasContent - Return true if this compile unit has something to write out.
91 bool hasContent() const { return !CUDie->getChildren().empty(); }
93 /// addGlobal - Add a new global entity to the compile unit.
95 void addGlobal(const std::string &Name, DIE *Die) { Globals[Name] = Die; }
97 /// addGlobalType - Add a new global type to the compile unit.
99 void addGlobalType(const std::string &Name, DIE *Die) {
100 GlobalTypes[Name] = Die;
103 /// getDIE - Returns the debug information entry map slot for the
104 /// specified debug variable.
105 DIE *getDIE(MDNode *N) { return GVToDieMap.lookup(N); }
107 /// insertDIE - Insert DIE into the map.
108 void insertDIE(MDNode *N, DIE *D) {
109 GVToDieMap.insert(std::make_pair(N, D));
112 /// getDIEEntry - Returns the debug information entry for the speciefied
114 DIEEntry *getDIEEntry(MDNode *N) {
115 DenseMap<MDNode *, DIEEntry *>::iterator I = GVToDIEEntryMap.find(N);
116 if (I == GVToDIEEntryMap.end())
121 /// insertDIEEntry - Insert debug information entry into the map.
122 void insertDIEEntry(MDNode *N, DIEEntry *E) {
123 GVToDIEEntryMap.insert(std::make_pair(N, E));
126 /// addDie - Adds or interns the DIE to the compile unit.
128 void addDie(DIE *Buffer) {
129 this->CUDie->addChild(Buffer);
132 // getIndexTyDie - Get an anonymous type for index type.
133 DIE *getIndexTyDie() {
137 // setIndexTyDie - Set D as anonymous type for index which can be reused
139 void setIndexTyDie(DIE *D) {
145 //===----------------------------------------------------------------------===//
146 /// DbgVariable - This class is used to track local variable information.
149 DIVariable Var; // Variable Descriptor.
150 unsigned FrameIndex; // Variable frame index.
151 const MachineInstr *DbgValueMInsn; // DBG_VALUE
152 DbgVariable *const AbstractVar; // Abstract variable for this variable.
155 // AbsVar may be NULL.
156 DbgVariable(DIVariable V, unsigned I, DbgVariable *AbsVar)
157 : Var(V), FrameIndex(I), DbgValueMInsn(0), AbstractVar(AbsVar), TheDIE(0) {}
158 DbgVariable(DIVariable V, const MachineInstr *MI, DbgVariable *AbsVar)
159 : Var(V), FrameIndex(0), DbgValueMInsn(MI), AbstractVar(AbsVar), TheDIE(0)
163 DIVariable getVariable() const { return Var; }
164 unsigned getFrameIndex() const { return FrameIndex; }
165 const MachineInstr *getDbgValue() const { return DbgValueMInsn; }
166 DbgVariable *getAbstractVariable() const { return AbstractVar; }
167 void setDIE(DIE *D) { TheDIE = D; }
168 DIE *getDIE() const { return TheDIE; }
171 //===----------------------------------------------------------------------===//
172 /// DbgScope - This class is used to track scope information.
175 DbgScope *Parent; // Parent to this scope.
176 DIDescriptor Desc; // Debug info descriptor for scope.
177 // Location at which this scope is inlined.
178 AssertingVH<MDNode> InlinedAtLocation;
179 bool AbstractScope; // Abstract Scope
180 MCSymbol *StartLabel; // Label ID of the beginning of scope.
181 MCSymbol *EndLabel; // Label ID of the end of scope.
182 const MachineInstr *LastInsn; // Last instruction of this scope.
183 const MachineInstr *FirstInsn; // First instruction of this scope.
184 // Scopes defined in scope. Contents not owned.
185 SmallVector<DbgScope *, 4> Scopes;
186 // Variables declared in scope. Contents owned.
187 SmallVector<DbgVariable *, 8> Variables;
189 // Private state for dump()
190 mutable unsigned IndentLevel;
192 DbgScope(DbgScope *P, DIDescriptor D, MDNode *I = 0)
193 : Parent(P), Desc(D), InlinedAtLocation(I), AbstractScope(false),
194 StartLabel(0), EndLabel(0),
195 LastInsn(0), FirstInsn(0), IndentLevel(0) {}
199 DbgScope *getParent() const { return Parent; }
200 void setParent(DbgScope *P) { Parent = P; }
201 DIDescriptor getDesc() const { return Desc; }
202 MDNode *getInlinedAt() const { return InlinedAtLocation; }
203 MDNode *getScopeNode() const { return Desc.getNode(); }
204 MCSymbol *getStartLabel() const { return StartLabel; }
205 MCSymbol *getEndLabel() const { return EndLabel; }
206 const SmallVector<DbgScope *, 4> &getScopes() { return Scopes; }
207 const SmallVector<DbgVariable *, 8> &getVariables() { return Variables; }
208 void setStartLabel(MCSymbol *S) { StartLabel = S; }
209 void setEndLabel(MCSymbol *E) { EndLabel = E; }
210 void setLastInsn(const MachineInstr *MI) { LastInsn = MI; }
211 const MachineInstr *getLastInsn() { return LastInsn; }
212 void setFirstInsn(const MachineInstr *MI) { FirstInsn = MI; }
213 void setAbstractScope() { AbstractScope = true; }
214 bool isAbstractScope() const { return AbstractScope; }
215 const MachineInstr *getFirstInsn() { return FirstInsn; }
217 /// addScope - Add a scope to the scope.
219 void addScope(DbgScope *S) { Scopes.push_back(S); }
221 /// addVariable - Add a variable to the scope.
223 void addVariable(DbgVariable *V) { Variables.push_back(V); }
225 void fixInstructionMarkers(DenseMap<const MachineInstr *,
226 unsigned> &MIIndexMap) {
227 assert (getFirstInsn() && "First instruction is missing!");
229 // Use the end of last child scope as end of this scope.
230 const SmallVector<DbgScope *, 4> &Scopes = getScopes();
231 const MachineInstr *LastInsn = getFirstInsn();
233 if (Scopes.empty()) {
234 assert (getLastInsn() && "Inner most scope does not have last insn!");
237 for (SmallVector<DbgScope *, 4>::const_iterator SI = Scopes.begin(),
238 SE = Scopes.end(); SI != SE; ++SI) {
240 DS->fixInstructionMarkers(MIIndexMap);
241 const MachineInstr *DSLastInsn = DS->getLastInsn();
242 unsigned DSI = MIIndexMap[DSLastInsn];
244 LastInsn = DSLastInsn;
249 unsigned CurrentLastInsnIndex = 0;
250 if (const MachineInstr *CL = getLastInsn())
251 CurrentLastInsnIndex = MIIndexMap[CL];
252 unsigned FIndex = MIIndexMap[getFirstInsn()];
254 // Set LastInsn as the last instruction for this scope only if
256 // 1) this scope's first instruction and
257 // 2) current last instruction for this scope, if any.
258 if (LIndex >= CurrentLastInsnIndex && LIndex >= FIndex)
259 setLastInsn(LastInsn);
268 void DbgScope::dump() const {
269 raw_ostream &err = dbgs();
270 err.indent(IndentLevel);
271 MDNode *N = Desc.getNode();
273 err << " [" << StartLabel << ", " << EndLabel << "]\n";
275 err << "Abstract Scope\n";
279 err << "Children ...\n";
280 for (unsigned i = 0, e = Scopes.size(); i != e; ++i)
281 if (Scopes[i] != this)
288 DbgScope::~DbgScope() {
289 for (unsigned j = 0, M = Variables.size(); j < M; ++j)
293 } // end llvm namespace
295 DwarfDebug::DwarfDebug(raw_ostream &OS, AsmPrinter *A, const MCAsmInfo *T)
296 : DwarfPrinter(OS, A, T), ModuleCU(0),
297 AbbreviationsSet(InitAbbreviationsSetSize), Abbreviations(),
298 DIEValues(), SectionSourceLines(), didInitial(false), shouldEmit(false),
299 CurrentFnDbgScope(0), PrevDILoc(0), DebugTimer(0) {
300 NextStringPoolNumber = 0;
301 if (TimePassesIsEnabled)
302 DebugTimer = new Timer("Dwarf Debug Writer");
304 DwarfDebug::~DwarfDebug() {
305 for (unsigned j = 0, M = DIEValues.size(); j < M; ++j)
311 MCSymbol *DwarfDebug::getStringPoolEntry(StringRef Str) {
312 std::pair<MCSymbol*, unsigned> &Entry = StringPool[Str];
313 if (Entry.first) return Entry.first;
315 Entry.second = NextStringPoolNumber++;
316 return Entry.first = getDWLabel("string", Entry.second);
320 /// assignAbbrevNumber - Define a unique number for the abbreviation.
322 void DwarfDebug::assignAbbrevNumber(DIEAbbrev &Abbrev) {
323 // Profile the node so that we can make it unique.
327 // Check the set for priors.
328 DIEAbbrev *InSet = AbbreviationsSet.GetOrInsertNode(&Abbrev);
330 // If it's newly added.
331 if (InSet == &Abbrev) {
332 // Add to abbreviation list.
333 Abbreviations.push_back(&Abbrev);
335 // Assign the vector position + 1 as its number.
336 Abbrev.setNumber(Abbreviations.size());
338 // Assign existing abbreviation number.
339 Abbrev.setNumber(InSet->getNumber());
343 /// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug
344 /// information entry.
345 DIEEntry *DwarfDebug::createDIEEntry(DIE *Entry) {
346 DIEEntry *Value = new DIEEntry(Entry);
347 DIEValues.push_back(Value);
351 /// addUInt - Add an unsigned integer attribute data and value.
353 void DwarfDebug::addUInt(DIE *Die, unsigned Attribute,
354 unsigned Form, uint64_t Integer) {
355 if (!Form) Form = DIEInteger::BestForm(false, Integer);
356 DIEValue *Value = new DIEInteger(Integer);
357 DIEValues.push_back(Value);
358 Die->addValue(Attribute, Form, Value);
361 /// addSInt - Add an signed integer attribute data and value.
363 void DwarfDebug::addSInt(DIE *Die, unsigned Attribute,
364 unsigned Form, int64_t Integer) {
365 if (!Form) Form = DIEInteger::BestForm(true, Integer);
366 DIEValue *Value = new DIEInteger(Integer);
367 DIEValues.push_back(Value);
368 Die->addValue(Attribute, Form, Value);
371 /// addString - Add a string attribute data and value. DIEString only
372 /// keeps string reference.
373 void DwarfDebug::addString(DIE *Die, unsigned Attribute, unsigned Form,
375 DIEValue *Value = new DIEString(String);
376 DIEValues.push_back(Value);
377 Die->addValue(Attribute, Form, Value);
380 /// addLabel - Add a Dwarf label attribute data and value.
382 void DwarfDebug::addLabel(DIE *Die, unsigned Attribute, unsigned Form,
383 const MCSymbol *Label) {
384 DIEValue *Value = new DIELabel(Label);
385 DIEValues.push_back(Value);
386 Die->addValue(Attribute, Form, Value);
389 /// addDelta - Add a label delta attribute data and value.
391 void DwarfDebug::addDelta(DIE *Die, unsigned Attribute, unsigned Form,
392 const MCSymbol *Hi, const MCSymbol *Lo) {
393 DIEValue *Value = new DIEDelta(Hi, Lo);
394 DIEValues.push_back(Value);
395 Die->addValue(Attribute, Form, Value);
398 /// addBlock - Add block data.
400 void DwarfDebug::addBlock(DIE *Die, unsigned Attribute, unsigned Form,
402 Block->ComputeSize(TD);
403 DIEValues.push_back(Block);
404 Die->addValue(Attribute, Block->BestForm(), Block);
407 /// addSourceLine - Add location information to specified debug information
409 void DwarfDebug::addSourceLine(DIE *Die, const DIVariable *V) {
410 // If there is no compile unit specified, don't add a line #.
411 if (!V->getCompileUnit().Verify())
414 unsigned Line = V->getLineNumber();
415 unsigned FileID = GetOrCreateSourceID(V->getContext().getDirectory(),
416 V->getContext().getFilename());
417 assert(FileID && "Invalid file id");
418 addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
419 addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
422 /// addSourceLine - Add location information to specified debug information
424 void DwarfDebug::addSourceLine(DIE *Die, const DIGlobal *G) {
425 // If there is no compile unit specified, don't add a line #.
426 if (!G->getCompileUnit().Verify())
429 unsigned Line = G->getLineNumber();
430 unsigned FileID = GetOrCreateSourceID(G->getContext().getDirectory(),
431 G->getContext().getFilename());
432 assert(FileID && "Invalid file id");
433 addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
434 addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
437 /// addSourceLine - Add location information to specified debug information
439 void DwarfDebug::addSourceLine(DIE *Die, const DISubprogram *SP) {
440 // If there is no compile unit specified, don't add a line #.
441 if (!SP->getCompileUnit().Verify())
443 // If the line number is 0, don't add it.
444 if (SP->getLineNumber() == 0)
447 unsigned Line = SP->getLineNumber();
448 if (!SP->getContext().Verify())
450 unsigned FileID = GetOrCreateSourceID(SP->getDirectory(),
452 assert(FileID && "Invalid file id");
453 addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
454 addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
457 /// addSourceLine - Add location information to specified debug information
459 void DwarfDebug::addSourceLine(DIE *Die, const DIType *Ty) {
460 // If there is no compile unit specified, don't add a line #.
461 DICompileUnit CU = Ty->getCompileUnit();
465 unsigned Line = Ty->getLineNumber();
466 if (!Ty->getContext().Verify())
468 unsigned FileID = GetOrCreateSourceID(Ty->getContext().getDirectory(),
469 Ty->getContext().getFilename());
470 assert(FileID && "Invalid file id");
471 addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
472 addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
475 /// addSourceLine - Add location information to specified debug information
477 void DwarfDebug::addSourceLine(DIE *Die, const DINameSpace *NS) {
478 // If there is no compile unit specified, don't add a line #.
479 if (!NS->getCompileUnit().Verify())
482 unsigned Line = NS->getLineNumber();
483 StringRef FN = NS->getFilename();
484 StringRef Dir = NS->getDirectory();
486 unsigned FileID = GetOrCreateSourceID(Dir, FN);
487 assert(FileID && "Invalid file id");
488 addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
489 addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
492 /* Byref variables, in Blocks, are declared by the programmer as
493 "SomeType VarName;", but the compiler creates a
494 __Block_byref_x_VarName struct, and gives the variable VarName
495 either the struct, or a pointer to the struct, as its type. This
496 is necessary for various behind-the-scenes things the compiler
497 needs to do with by-reference variables in blocks.
499 However, as far as the original *programmer* is concerned, the
500 variable should still have type 'SomeType', as originally declared.
502 The following function dives into the __Block_byref_x_VarName
503 struct to find the original type of the variable. This will be
504 passed back to the code generating the type for the Debug
505 Information Entry for the variable 'VarName'. 'VarName' will then
506 have the original type 'SomeType' in its debug information.
508 The original type 'SomeType' will be the type of the field named
509 'VarName' inside the __Block_byref_x_VarName struct.
511 NOTE: In order for this to not completely fail on the debugger
512 side, the Debug Information Entry for the variable VarName needs to
513 have a DW_AT_location that tells the debugger how to unwind through
514 the pointers and __Block_byref_x_VarName struct to find the actual
515 value of the variable. The function addBlockByrefType does this. */
517 /// Find the type the programmer originally declared the variable to be
518 /// and return that type.
520 DIType DwarfDebug::getBlockByrefType(DIType Ty, std::string Name) {
523 unsigned tag = Ty.getTag();
525 if (tag == dwarf::DW_TAG_pointer_type) {
526 DIDerivedType DTy = DIDerivedType(Ty.getNode());
527 subType = DTy.getTypeDerivedFrom();
530 DICompositeType blockStruct = DICompositeType(subType.getNode());
531 DIArray Elements = blockStruct.getTypeArray();
533 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
534 DIDescriptor Element = Elements.getElement(i);
535 DIDerivedType DT = DIDerivedType(Element.getNode());
536 if (Name == DT.getName())
537 return (DT.getTypeDerivedFrom());
543 /// addComplexAddress - Start with the address based on the location provided,
544 /// and generate the DWARF information necessary to find the actual variable
545 /// given the extra address information encoded in the DIVariable, starting from
546 /// the starting location. Add the DWARF information to the die.
548 void DwarfDebug::addComplexAddress(DbgVariable *&DV, DIE *Die,
550 const MachineLocation &Location) {
551 const DIVariable &VD = DV->getVariable();
552 DIType Ty = VD.getType();
554 // Decode the original location, and use that as the start of the byref
555 // variable's location.
556 unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
557 DIEBlock *Block = new DIEBlock();
559 if (Location.isReg()) {
561 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + Reg);
563 Reg = Reg - dwarf::DW_OP_reg0;
564 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg);
565 addUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
569 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg);
571 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx);
572 addUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
575 addUInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset());
578 for (unsigned i = 0, N = VD.getNumAddrElements(); i < N; ++i) {
579 uint64_t Element = VD.getAddrElement(i);
581 if (Element == DIFactory::OpPlus) {
582 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
583 addUInt(Block, 0, dwarf::DW_FORM_udata, VD.getAddrElement(++i));
584 } else if (Element == DIFactory::OpDeref) {
585 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
586 } else llvm_unreachable("unknown DIFactory Opcode");
589 // Now attach the location information to the DIE.
590 addBlock(Die, Attribute, 0, Block);
593 /* Byref variables, in Blocks, are declared by the programmer as "SomeType
594 VarName;", but the compiler creates a __Block_byref_x_VarName struct, and
595 gives the variable VarName either the struct, or a pointer to the struct, as
596 its type. This is necessary for various behind-the-scenes things the
597 compiler needs to do with by-reference variables in Blocks.
599 However, as far as the original *programmer* is concerned, the variable
600 should still have type 'SomeType', as originally declared.
602 The function getBlockByrefType dives into the __Block_byref_x_VarName
603 struct to find the original type of the variable, which is then assigned to
604 the variable's Debug Information Entry as its real type. So far, so good.
605 However now the debugger will expect the variable VarName to have the type
606 SomeType. So we need the location attribute for the variable to be an
607 expression that explains to the debugger how to navigate through the
608 pointers and struct to find the actual variable of type SomeType.
610 The following function does just that. We start by getting
611 the "normal" location for the variable. This will be the location
612 of either the struct __Block_byref_x_VarName or the pointer to the
613 struct __Block_byref_x_VarName.
615 The struct will look something like:
617 struct __Block_byref_x_VarName {
619 struct __Block_byref_x_VarName *forwarding;
620 ... <various other fields>
622 ... <maybe more fields>
625 If we are given the struct directly (as our starting point) we
626 need to tell the debugger to:
628 1). Add the offset of the forwarding field.
630 2). Follow that pointer to get the real __Block_byref_x_VarName
631 struct to use (the real one may have been copied onto the heap).
633 3). Add the offset for the field VarName, to find the actual variable.
635 If we started with a pointer to the struct, then we need to
636 dereference that pointer first, before the other steps.
637 Translating this into DWARF ops, we will need to append the following
638 to the current location description for the variable:
640 DW_OP_deref -- optional, if we start with a pointer
641 DW_OP_plus_uconst <forward_fld_offset>
643 DW_OP_plus_uconst <varName_fld_offset>
645 That is what this function does. */
647 /// addBlockByrefAddress - Start with the address based on the location
648 /// provided, and generate the DWARF information necessary to find the
649 /// actual Block variable (navigating the Block struct) based on the
650 /// starting location. Add the DWARF information to the die. For
651 /// more information, read large comment just above here.
653 void DwarfDebug::addBlockByrefAddress(DbgVariable *&DV, DIE *Die,
655 const MachineLocation &Location) {
656 const DIVariable &VD = DV->getVariable();
657 DIType Ty = VD.getType();
659 unsigned Tag = Ty.getTag();
660 bool isPointer = false;
662 StringRef varName = VD.getName();
664 if (Tag == dwarf::DW_TAG_pointer_type) {
665 DIDerivedType DTy = DIDerivedType(Ty.getNode());
666 TmpTy = DTy.getTypeDerivedFrom();
670 DICompositeType blockStruct = DICompositeType(TmpTy.getNode());
672 // Find the __forwarding field and the variable field in the __Block_byref
674 DIArray Fields = blockStruct.getTypeArray();
675 DIDescriptor varField = DIDescriptor();
676 DIDescriptor forwardingField = DIDescriptor();
678 for (unsigned i = 0, N = Fields.getNumElements(); i < N; ++i) {
679 DIDescriptor Element = Fields.getElement(i);
680 DIDerivedType DT = DIDerivedType(Element.getNode());
681 StringRef fieldName = DT.getName();
682 if (fieldName == "__forwarding")
683 forwardingField = Element;
684 else if (fieldName == varName)
688 // Get the offsets for the forwarding field and the variable field.
689 unsigned int forwardingFieldOffset =
690 DIDerivedType(forwardingField.getNode()).getOffsetInBits() >> 3;
691 unsigned int varFieldOffset =
692 DIDerivedType(varField.getNode()).getOffsetInBits() >> 3;
694 // Decode the original location, and use that as the start of the byref
695 // variable's location.
696 unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
697 DIEBlock *Block = new DIEBlock();
699 if (Location.isReg()) {
701 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + Reg);
703 Reg = Reg - dwarf::DW_OP_reg0;
704 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg);
705 addUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
709 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg);
711 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx);
712 addUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
715 addUInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset());
718 // If we started with a pointer to the __Block_byref... struct, then
719 // the first thing we need to do is dereference the pointer (DW_OP_deref).
721 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
723 // Next add the offset for the '__forwarding' field:
724 // DW_OP_plus_uconst ForwardingFieldOffset. Note there's no point in
725 // adding the offset if it's 0.
726 if (forwardingFieldOffset > 0) {
727 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
728 addUInt(Block, 0, dwarf::DW_FORM_udata, forwardingFieldOffset);
731 // Now dereference the __forwarding field to get to the real __Block_byref
732 // struct: DW_OP_deref.
733 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
735 // Now that we've got the real __Block_byref... struct, add the offset
736 // for the variable's field to get to the location of the actual variable:
737 // DW_OP_plus_uconst varFieldOffset. Again, don't add if it's 0.
738 if (varFieldOffset > 0) {
739 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
740 addUInt(Block, 0, dwarf::DW_FORM_udata, varFieldOffset);
743 // Now attach the location information to the DIE.
744 addBlock(Die, Attribute, 0, Block);
747 /// addAddress - Add an address attribute to a die based on the location
749 void DwarfDebug::addAddress(DIE *Die, unsigned Attribute,
750 const MachineLocation &Location) {
751 unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
752 DIEBlock *Block = new DIEBlock();
754 if (Location.isReg()) {
756 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + Reg);
758 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_regx);
759 addUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
763 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + Reg);
765 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx);
766 addUInt(Block, 0, dwarf::DW_FORM_udata, Reg);
769 addUInt(Block, 0, dwarf::DW_FORM_sdata, Location.getOffset());
772 addBlock(Die, Attribute, 0, Block);
775 /// addToContextOwner - Add Die into the list of its context owner's children.
776 void DwarfDebug::addToContextOwner(DIE *Die, DIDescriptor Context) {
777 if (Context.isType()) {
778 DIE *ContextDIE = getOrCreateTypeDIE(DIType(Context.getNode()));
779 ContextDIE->addChild(Die);
780 } else if (Context.isNameSpace()) {
781 DIE *ContextDIE = getOrCreateNameSpace(DINameSpace(Context.getNode()));
782 ContextDIE->addChild(Die);
783 } else if (DIE *ContextDIE = ModuleCU->getDIE(Context.getNode()))
784 ContextDIE->addChild(Die);
786 ModuleCU->addDie(Die);
789 /// getOrCreateTypeDIE - Find existing DIE or create new DIE for the
791 DIE *DwarfDebug::getOrCreateTypeDIE(DIType Ty) {
792 DIE *TyDIE = ModuleCU->getDIE(Ty.getNode());
797 TyDIE = new DIE(dwarf::DW_TAG_base_type);
798 ModuleCU->insertDIE(Ty.getNode(), TyDIE);
799 if (Ty.isBasicType())
800 constructTypeDIE(*TyDIE, DIBasicType(Ty.getNode()));
801 else if (Ty.isCompositeType())
802 constructTypeDIE(*TyDIE, DICompositeType(Ty.getNode()));
804 assert(Ty.isDerivedType() && "Unknown kind of DIType");
805 constructTypeDIE(*TyDIE, DIDerivedType(Ty.getNode()));
808 addToContextOwner(TyDIE, Ty.getContext());
812 /// addType - Add a new type attribute to the specified entity.
813 void DwarfDebug::addType(DIE *Entity, DIType Ty) {
817 // Check for pre-existence.
818 DIEEntry *Entry = ModuleCU->getDIEEntry(Ty.getNode());
819 // If it exists then use the existing value.
821 Entity->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, Entry);
826 DIE *Buffer = getOrCreateTypeDIE(Ty);
829 Entry = createDIEEntry(Buffer);
830 ModuleCU->insertDIEEntry(Ty.getNode(), Entry);
832 Entity->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, Entry);
835 /// constructTypeDIE - Construct basic type die from DIBasicType.
836 void DwarfDebug::constructTypeDIE(DIE &Buffer, DIBasicType BTy) {
837 // Get core information.
838 StringRef Name = BTy.getName();
839 Buffer.setTag(dwarf::DW_TAG_base_type);
840 addUInt(&Buffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
843 // Add name if not anonymous or intermediate type.
845 addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
846 uint64_t Size = BTy.getSizeInBits() >> 3;
847 addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
850 /// constructTypeDIE - Construct derived type die from DIDerivedType.
851 void DwarfDebug::constructTypeDIE(DIE &Buffer, DIDerivedType DTy) {
852 // Get core information.
853 StringRef Name = DTy.getName();
854 uint64_t Size = DTy.getSizeInBits() >> 3;
855 unsigned Tag = DTy.getTag();
857 // FIXME - Workaround for templates.
858 if (Tag == dwarf::DW_TAG_inheritance) Tag = dwarf::DW_TAG_reference_type;
862 // Map to main type, void will not have a type.
863 DIType FromTy = DTy.getTypeDerivedFrom();
864 addType(&Buffer, FromTy);
866 // Add name if not anonymous or intermediate type.
868 addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
870 // Add size if non-zero (derived types might be zero-sized.)
872 addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
874 // Add source line info if available and TyDesc is not a forward declaration.
875 if (!DTy.isForwardDecl())
876 addSourceLine(&Buffer, &DTy);
879 /// constructTypeDIE - Construct type DIE from DICompositeType.
880 void DwarfDebug::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
881 // Get core information.
882 StringRef Name = CTy.getName();
884 uint64_t Size = CTy.getSizeInBits() >> 3;
885 unsigned Tag = CTy.getTag();
889 case dwarf::DW_TAG_vector_type:
890 case dwarf::DW_TAG_array_type:
891 constructArrayTypeDIE(Buffer, &CTy);
893 case dwarf::DW_TAG_enumeration_type: {
894 DIArray Elements = CTy.getTypeArray();
896 // Add enumerators to enumeration type.
897 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
899 DIDescriptor Enum(Elements.getElement(i).getNode());
900 if (Enum.isEnumerator()) {
901 ElemDie = constructEnumTypeDIE(DIEnumerator(Enum.getNode()));
902 Buffer.addChild(ElemDie);
907 case dwarf::DW_TAG_subroutine_type: {
909 DIArray Elements = CTy.getTypeArray();
910 DIDescriptor RTy = Elements.getElement(0);
911 addType(&Buffer, DIType(RTy.getNode()));
913 // Add prototype flag.
914 addUInt(&Buffer, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1);
917 for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) {
918 DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
919 DIDescriptor Ty = Elements.getElement(i);
920 addType(Arg, DIType(Ty.getNode()));
921 Buffer.addChild(Arg);
925 case dwarf::DW_TAG_structure_type:
926 case dwarf::DW_TAG_union_type:
927 case dwarf::DW_TAG_class_type: {
928 // Add elements to structure type.
929 DIArray Elements = CTy.getTypeArray();
931 // A forward struct declared type may not have elements available.
932 unsigned N = Elements.getNumElements();
936 // Add elements to structure type.
937 for (unsigned i = 0; i < N; ++i) {
938 DIDescriptor Element = Elements.getElement(i);
940 if (Element.isSubprogram())
941 ElemDie = createSubprogramDIE(DISubprogram(Element.getNode()));
942 else if (Element.isVariable()) {
943 DIVariable DV(Element.getNode());
944 ElemDie = new DIE(dwarf::DW_TAG_variable);
945 addString(ElemDie, dwarf::DW_AT_name, dwarf::DW_FORM_string,
947 addType(ElemDie, DV.getType());
948 addUInt(ElemDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
949 addUInt(ElemDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
950 addSourceLine(ElemDie, &DV);
951 } else if (Element.isDerivedType())
952 ElemDie = createMemberDIE(DIDerivedType(Element.getNode()));
955 Buffer.addChild(ElemDie);
958 if (CTy.isAppleBlockExtension())
959 addUInt(&Buffer, dwarf::DW_AT_APPLE_block, dwarf::DW_FORM_flag, 1);
961 unsigned RLang = CTy.getRunTimeLang();
963 addUInt(&Buffer, dwarf::DW_AT_APPLE_runtime_class,
964 dwarf::DW_FORM_data1, RLang);
966 DICompositeType ContainingType = CTy.getContainingType();
967 if (DIDescriptor(ContainingType.getNode()).isCompositeType())
968 addDIEEntry(&Buffer, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4,
969 getOrCreateTypeDIE(DIType(ContainingType.getNode())));
976 // Add name if not anonymous or intermediate type.
978 addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
980 if (Tag == dwarf::DW_TAG_enumeration_type || Tag == dwarf::DW_TAG_class_type ||
981 Tag == dwarf::DW_TAG_structure_type || Tag == dwarf::DW_TAG_union_type) {
982 // Add size if non-zero (derived types might be zero-sized.)
984 addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
986 // Add zero size if it is not a forward declaration.
987 if (CTy.isForwardDecl())
988 addUInt(&Buffer, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
990 addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, 0);
993 // Add source line info if available.
994 if (!CTy.isForwardDecl())
995 addSourceLine(&Buffer, &CTy);
999 /// constructSubrangeDIE - Construct subrange DIE from DISubrange.
1000 void DwarfDebug::constructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy){
1001 int64_t L = SR.getLo();
1002 int64_t H = SR.getHi();
1003 DIE *DW_Subrange = new DIE(dwarf::DW_TAG_subrange_type);
1005 addDIEEntry(DW_Subrange, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IndexTy);
1007 addSInt(DW_Subrange, dwarf::DW_AT_lower_bound, 0, L);
1008 addSInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, H);
1010 Buffer.addChild(DW_Subrange);
1013 /// constructArrayTypeDIE - Construct array type DIE from DICompositeType.
1014 void DwarfDebug::constructArrayTypeDIE(DIE &Buffer,
1015 DICompositeType *CTy) {
1016 Buffer.setTag(dwarf::DW_TAG_array_type);
1017 if (CTy->getTag() == dwarf::DW_TAG_vector_type)
1018 addUInt(&Buffer, dwarf::DW_AT_GNU_vector, dwarf::DW_FORM_flag, 1);
1020 // Emit derived type.
1021 addType(&Buffer, CTy->getTypeDerivedFrom());
1022 DIArray Elements = CTy->getTypeArray();
1024 // Get an anonymous type for index type.
1025 DIE *IdxTy = ModuleCU->getIndexTyDie();
1027 // Construct an anonymous type for index type.
1028 IdxTy = new DIE(dwarf::DW_TAG_base_type);
1029 addUInt(IdxTy, dwarf::DW_AT_byte_size, 0, sizeof(int32_t));
1030 addUInt(IdxTy, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
1031 dwarf::DW_ATE_signed);
1032 ModuleCU->addDie(IdxTy);
1033 ModuleCU->setIndexTyDie(IdxTy);
1036 // Add subranges to array type.
1037 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
1038 DIDescriptor Element = Elements.getElement(i);
1039 if (Element.getTag() == dwarf::DW_TAG_subrange_type)
1040 constructSubrangeDIE(Buffer, DISubrange(Element.getNode()), IdxTy);
1044 /// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
1045 DIE *DwarfDebug::constructEnumTypeDIE(DIEnumerator ETy) {
1046 DIE *Enumerator = new DIE(dwarf::DW_TAG_enumerator);
1047 StringRef Name = ETy.getName();
1048 addString(Enumerator, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
1049 int64_t Value = ETy.getEnumValue();
1050 addSInt(Enumerator, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, Value);
1054 /// getRealLinkageName - If special LLVM prefix that is used to inform the asm
1055 /// printer to not emit usual symbol prefix before the symbol name is used then
1056 /// return linkage name after skipping this special LLVM prefix.
1057 static StringRef getRealLinkageName(StringRef LinkageName) {
1059 if (LinkageName.startswith(StringRef(&One, 1)))
1060 return LinkageName.substr(1);
1064 /// createGlobalVariableDIE - Create new DIE using GV.
1065 DIE *DwarfDebug::createGlobalVariableDIE(const DIGlobalVariable &GV) {
1066 // If the global variable was optmized out then no need to create debug info
1068 if (!GV.getGlobal()) return NULL;
1069 if (GV.getDisplayName().empty()) return NULL;
1071 DIE *GVDie = new DIE(dwarf::DW_TAG_variable);
1072 addString(GVDie, dwarf::DW_AT_name, dwarf::DW_FORM_string,
1073 GV.getDisplayName());
1075 StringRef LinkageName = GV.getLinkageName();
1076 if (!LinkageName.empty())
1077 addString(GVDie, dwarf::DW_AT_MIPS_linkage_name, dwarf::DW_FORM_string,
1078 getRealLinkageName(LinkageName));
1080 addType(GVDie, GV.getType());
1081 if (!GV.isLocalToUnit())
1082 addUInt(GVDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
1083 addSourceLine(GVDie, &GV);
1088 /// createMemberDIE - Create new member DIE.
1089 DIE *DwarfDebug::createMemberDIE(const DIDerivedType &DT) {
1090 DIE *MemberDie = new DIE(DT.getTag());
1091 StringRef Name = DT.getName();
1093 addString(MemberDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
1095 addType(MemberDie, DT.getTypeDerivedFrom());
1097 addSourceLine(MemberDie, &DT);
1099 DIEBlock *MemLocationDie = new DIEBlock();
1100 addUInt(MemLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
1102 uint64_t Size = DT.getSizeInBits();
1103 uint64_t FieldSize = DT.getOriginalTypeSize();
1105 if (Size != FieldSize) {
1107 addUInt(MemberDie, dwarf::DW_AT_byte_size, 0, DT.getOriginalTypeSize()>>3);
1108 addUInt(MemberDie, dwarf::DW_AT_bit_size, 0, DT.getSizeInBits());
1110 uint64_t Offset = DT.getOffsetInBits();
1111 uint64_t AlignMask = ~(DT.getAlignInBits() - 1);
1112 uint64_t HiMark = (Offset + FieldSize) & AlignMask;
1113 uint64_t FieldOffset = (HiMark - FieldSize);
1114 Offset -= FieldOffset;
1116 // Maybe we need to work from the other end.
1117 if (TD->isLittleEndian()) Offset = FieldSize - (Offset + Size);
1118 addUInt(MemberDie, dwarf::DW_AT_bit_offset, 0, Offset);
1120 // Here WD_AT_data_member_location points to the anonymous
1121 // field that includes this bit field.
1122 addUInt(MemLocationDie, 0, dwarf::DW_FORM_udata, FieldOffset >> 3);
1125 // This is not a bitfield.
1126 addUInt(MemLocationDie, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits() >> 3);
1128 if (DT.getTag() == dwarf::DW_TAG_inheritance
1129 && DT.isVirtual()) {
1131 // For C++, virtual base classes are not at fixed offset. Use following
1132 // expression to extract appropriate offset from vtable.
1133 // BaseAddr = ObAddr + *((*ObAddr) - Offset)
1135 DIEBlock *VBaseLocationDie = new DIEBlock();
1136 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_dup);
1137 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
1138 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
1139 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits());
1140 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_minus);
1141 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
1142 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
1144 addBlock(MemberDie, dwarf::DW_AT_data_member_location, 0,
1147 addBlock(MemberDie, dwarf::DW_AT_data_member_location, 0, MemLocationDie);
1149 if (DT.isProtected())
1150 addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag,
1151 dwarf::DW_ACCESS_protected);
1152 else if (DT.isPrivate())
1153 addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag,
1154 dwarf::DW_ACCESS_private);
1155 else if (DT.getTag() == dwarf::DW_TAG_inheritance)
1156 addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag,
1157 dwarf::DW_ACCESS_public);
1159 addUInt(MemberDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_flag,
1160 dwarf::DW_VIRTUALITY_virtual);
1164 /// createSubprogramDIE - Create new DIE using SP.
1165 DIE *DwarfDebug::createSubprogramDIE(const DISubprogram &SP, bool MakeDecl) {
1166 DIE *SPDie = ModuleCU->getDIE(SP.getNode());
1170 SPDie = new DIE(dwarf::DW_TAG_subprogram);
1171 // Constructors and operators for anonymous aggregates do not have names.
1172 if (!SP.getName().empty())
1173 addString(SPDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, SP.getName());
1175 StringRef LinkageName = SP.getLinkageName();
1176 if (!LinkageName.empty())
1177 addString(SPDie, dwarf::DW_AT_MIPS_linkage_name, dwarf::DW_FORM_string,
1178 getRealLinkageName(LinkageName));
1180 addSourceLine(SPDie, &SP);
1182 // Add prototyped tag, if C or ObjC.
1183 unsigned Lang = SP.getCompileUnit().getLanguage();
1184 if (Lang == dwarf::DW_LANG_C99 || Lang == dwarf::DW_LANG_C89 ||
1185 Lang == dwarf::DW_LANG_ObjC)
1186 addUInt(SPDie, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1);
1189 DICompositeType SPTy = SP.getType();
1190 DIArray Args = SPTy.getTypeArray();
1191 unsigned SPTag = SPTy.getTag();
1193 if (Args.getNumElements() == 0 || SPTag != dwarf::DW_TAG_subroutine_type)
1194 addType(SPDie, SPTy);
1196 addType(SPDie, DIType(Args.getElement(0).getNode()));
1198 unsigned VK = SP.getVirtuality();
1200 addUInt(SPDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_flag, VK);
1201 DIEBlock *Block = new DIEBlock();
1202 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
1203 addUInt(Block, 0, dwarf::DW_FORM_data1, SP.getVirtualIndex());
1204 addBlock(SPDie, dwarf::DW_AT_vtable_elem_location, 0, Block);
1205 ContainingTypeMap.insert(std::make_pair(SPDie,
1206 SP.getContainingType().getNode()));
1209 if (MakeDecl || !SP.isDefinition()) {
1210 addUInt(SPDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
1212 // Add arguments. Do not add arguments for subprogram definition. They will
1213 // be handled while processing variables.
1214 DICompositeType SPTy = SP.getType();
1215 DIArray Args = SPTy.getTypeArray();
1216 unsigned SPTag = SPTy.getTag();
1218 if (SPTag == dwarf::DW_TAG_subroutine_type)
1219 for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
1220 DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
1221 DIType ATy = DIType(DIType(Args.getElement(i).getNode()));
1223 if (ATy.isArtificial())
1224 addUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1);
1225 SPDie->addChild(Arg);
1229 if (SP.isArtificial())
1230 addUInt(SPDie, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1);
1232 // DW_TAG_inlined_subroutine may refer to this DIE.
1233 ModuleCU->insertDIE(SP.getNode(), SPDie);
1237 /// getUpdatedDbgScope - Find or create DbgScope assicated with the instruction.
1238 /// Initialize scope and update scope hierarchy.
1239 DbgScope *DwarfDebug::getUpdatedDbgScope(MDNode *N, const MachineInstr *MI,
1240 MDNode *InlinedAt) {
1241 assert (N && "Invalid Scope encoding!");
1242 assert (MI && "Missing machine instruction!");
1243 bool GetConcreteScope = (MI && InlinedAt);
1245 DbgScope *NScope = NULL;
1248 NScope = DbgScopeMap.lookup(InlinedAt);
1250 NScope = DbgScopeMap.lookup(N);
1251 assert (NScope && "Unable to find working scope!");
1253 if (NScope->getFirstInsn())
1256 DbgScope *Parent = NULL;
1257 if (GetConcreteScope) {
1258 DILocation IL(InlinedAt);
1259 Parent = getUpdatedDbgScope(IL.getScope().getNode(), MI,
1260 IL.getOrigLocation().getNode());
1261 assert (Parent && "Unable to find Parent scope!");
1262 NScope->setParent(Parent);
1263 Parent->addScope(NScope);
1264 } else if (DIDescriptor(N).isLexicalBlock()) {
1265 DILexicalBlock DB(N);
1266 Parent = getUpdatedDbgScope(DB.getContext().getNode(), MI, InlinedAt);
1267 NScope->setParent(Parent);
1268 Parent->addScope(NScope);
1271 NScope->setFirstInsn(MI);
1273 if (!Parent && !InlinedAt) {
1274 StringRef SPName = DISubprogram(N).getLinkageName();
1275 if (SPName == MF->getFunction()->getName())
1276 CurrentFnDbgScope = NScope;
1279 if (GetConcreteScope) {
1280 ConcreteScopes[InlinedAt] = NScope;
1281 getOrCreateAbstractScope(N);
1287 DbgScope *DwarfDebug::getOrCreateAbstractScope(MDNode *N) {
1288 assert (N && "Invalid Scope encoding!");
1290 DbgScope *AScope = AbstractScopes.lookup(N);
1294 DbgScope *Parent = NULL;
1296 DIDescriptor Scope(N);
1297 if (Scope.isLexicalBlock()) {
1298 DILexicalBlock DB(N);
1299 DIDescriptor ParentDesc = DB.getContext();
1300 Parent = getOrCreateAbstractScope(ParentDesc.getNode());
1303 AScope = new DbgScope(Parent, DIDescriptor(N), NULL);
1306 Parent->addScope(AScope);
1307 AScope->setAbstractScope();
1308 AbstractScopes[N] = AScope;
1309 if (DIDescriptor(N).isSubprogram())
1310 AbstractScopesList.push_back(AScope);
1314 /// updateSubprogramScopeDIE - Find DIE for the given subprogram and
1315 /// attach appropriate DW_AT_low_pc and DW_AT_high_pc attributes.
1316 /// If there are global variables in this scope then create and insert
1317 /// DIEs for these variables.
1318 DIE *DwarfDebug::updateSubprogramScopeDIE(MDNode *SPNode) {
1319 DIE *SPDie = ModuleCU->getDIE(SPNode);
1320 assert(SPDie && "Unable to find subprogram DIE!");
1321 DISubprogram SP(SPNode);
1323 // There is not any need to generate specification DIE for a function
1324 // defined at compile unit level. If a function is defined inside another
1325 // function then gdb prefers the definition at top level and but does not
1326 // expect specification DIE in parent function. So avoid creating
1327 // specification DIE for a function defined inside a function.
1328 if (SP.isDefinition() && !SP.getContext().isCompileUnit() &&
1329 !SP.getContext().isFile() && !SP.getContext().isSubprogram()) {
1330 addUInt(SPDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
1333 DICompositeType SPTy = SP.getType();
1334 DIArray Args = SPTy.getTypeArray();
1335 unsigned SPTag = SPTy.getTag();
1336 if (SPTag == dwarf::DW_TAG_subroutine_type)
1337 for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
1338 DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
1339 DIType ATy = DIType(DIType(Args.getElement(i).getNode()));
1341 if (ATy.isArtificial())
1342 addUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1);
1343 SPDie->addChild(Arg);
1345 DIE *SPDeclDie = SPDie;
1346 SPDie = new DIE(dwarf::DW_TAG_subprogram);
1347 addDIEEntry(SPDie, dwarf::DW_AT_specification, dwarf::DW_FORM_ref4,
1349 ModuleCU->addDie(SPDie);
1352 addLabel(SPDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
1353 getDWLabel("func_begin", SubprogramCount));
1354 addLabel(SPDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
1355 getDWLabel("func_end", SubprogramCount));
1356 MachineLocation Location(RI->getFrameRegister(*MF));
1357 addAddress(SPDie, dwarf::DW_AT_frame_base, Location);
1359 if (!DISubprogram(SPNode).isLocalToUnit())
1360 addUInt(SPDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
1365 /// constructLexicalScope - Construct new DW_TAG_lexical_block
1366 /// for this scope and attach DW_AT_low_pc/DW_AT_high_pc labels.
1367 DIE *DwarfDebug::constructLexicalScopeDIE(DbgScope *Scope) {
1368 MCSymbol *Start = Scope->getStartLabel();
1369 MCSymbol *End = Scope->getEndLabel();
1370 if (Start == 0) return 0;
1372 assert(Start->isDefined() && "Invalid starting label for an inlined scope!");
1373 assert(End->isDefined() && "Invalid end label for an inlined scope!");
1375 DIE *ScopeDIE = new DIE(dwarf::DW_TAG_lexical_block);
1376 if (Scope->isAbstractScope())
1379 addLabel(ScopeDIE, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
1380 Start ? Start : getDWLabel("func_begin", SubprogramCount));
1381 addLabel(ScopeDIE, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
1382 End ? End : getDWLabel("func_end", SubprogramCount));
1387 /// constructInlinedScopeDIE - This scope represents inlined body of
1388 /// a function. Construct DIE to represent this concrete inlined copy
1389 /// of the function.
1390 DIE *DwarfDebug::constructInlinedScopeDIE(DbgScope *Scope) {
1391 MCSymbol *StartLabel = Scope->getStartLabel();
1392 MCSymbol *EndLabel = Scope->getEndLabel();
1393 if (StartLabel == 0) return 0;
1395 assert(StartLabel->isDefined() &&
1396 "Invalid starting label for an inlined scope!");
1397 assert(EndLabel->isDefined() &&
1398 "Invalid end label for an inlined scope!");
1399 if (!Scope->getScopeNode())
1401 DIScope DS(Scope->getScopeNode());
1402 DIE *ScopeDIE = new DIE(dwarf::DW_TAG_inlined_subroutine);
1404 DISubprogram InlinedSP = getDISubprogram(DS.getNode());
1405 DIE *OriginDIE = ModuleCU->getDIE(InlinedSP.getNode());
1406 assert (OriginDIE && "Unable to find Origin DIE!");
1407 addDIEEntry(ScopeDIE, dwarf::DW_AT_abstract_origin,
1408 dwarf::DW_FORM_ref4, OriginDIE);
1410 addLabel(ScopeDIE, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr, StartLabel);
1411 addLabel(ScopeDIE, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr, EndLabel);
1413 InlinedSubprogramDIEs.insert(OriginDIE);
1415 // Track the start label for this inlined function.
1416 DenseMap<MDNode *, SmallVector<InlineInfoLabels, 4> >::iterator
1417 I = InlineInfo.find(InlinedSP.getNode());
1419 if (I == InlineInfo.end()) {
1420 InlineInfo[InlinedSP.getNode()].push_back(std::make_pair(StartLabel,
1422 InlinedSPNodes.push_back(InlinedSP.getNode());
1424 I->second.push_back(std::make_pair(StartLabel, ScopeDIE));
1426 DILocation DL(Scope->getInlinedAt());
1427 addUInt(ScopeDIE, dwarf::DW_AT_call_file, 0, ModuleCU->getID());
1428 addUInt(ScopeDIE, dwarf::DW_AT_call_line, 0, DL.getLineNumber());
1434 /// constructVariableDIE - Construct a DIE for the given DbgVariable.
1435 DIE *DwarfDebug::constructVariableDIE(DbgVariable *DV, DbgScope *Scope) {
1436 // Get the descriptor.
1437 const DIVariable &VD = DV->getVariable();
1438 StringRef Name = VD.getName();
1442 // Translate tag to proper Dwarf tag. The result variable is dropped for
1445 switch (VD.getTag()) {
1446 case dwarf::DW_TAG_return_variable:
1448 case dwarf::DW_TAG_arg_variable:
1449 Tag = dwarf::DW_TAG_formal_parameter;
1451 case dwarf::DW_TAG_auto_variable: // fall thru
1453 Tag = dwarf::DW_TAG_variable;
1457 // Define variable debug information entry.
1458 DIE *VariableDie = new DIE(Tag);
1462 if (DbgVariable *AV = DV->getAbstractVariable())
1463 AbsDIE = AV->getDIE();
1466 DIScope DS(Scope->getScopeNode());
1467 DISubprogram InlinedSP = getDISubprogram(DS.getNode());
1468 DIE *OriginSPDIE = ModuleCU->getDIE(InlinedSP.getNode());
1470 assert (OriginSPDIE && "Unable to find Origin DIE for the SP!");
1471 DIE *AbsDIE = DV->getAbstractVariable()->getDIE();
1472 assert (AbsDIE && "Unable to find Origin DIE for the Variable!");
1473 addDIEEntry(VariableDie, dwarf::DW_AT_abstract_origin,
1474 dwarf::DW_FORM_ref4, AbsDIE);
1477 addString(VariableDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name);
1478 addSourceLine(VariableDie, &VD);
1480 // Add variable type.
1481 // FIXME: isBlockByrefVariable should be reformulated in terms of complex
1482 // addresses instead.
1483 if (VD.isBlockByrefVariable())
1484 addType(VariableDie, getBlockByrefType(VD.getType(), Name));
1486 addType(VariableDie, VD.getType());
1489 // Add variable address.
1490 if (!Scope->isAbstractScope()) {
1491 // Check if variable is described by DBG_VALUE instruction.
1492 if (const MachineInstr *DbgValueInsn = DV->getDbgValue()) {
1493 if (DbgValueInsn->getNumOperands() == 3) {
1494 // FIXME : Handle getNumOperands != 3
1495 if (DbgValueInsn->getOperand(0).getType()
1496 == MachineOperand::MO_Register
1497 && DbgValueInsn->getOperand(0).getReg()) {
1498 MachineLocation Location;
1499 Location.set(DbgValueInsn->getOperand(0).getReg());
1500 addAddress(VariableDie, dwarf::DW_AT_location, Location);
1501 } else if (DbgValueInsn->getOperand(0).getType() ==
1502 MachineOperand::MO_Immediate) {
1503 DIEBlock *Block = new DIEBlock();
1504 unsigned Imm = DbgValueInsn->getOperand(0).getImm();
1505 addUInt(Block, 0, dwarf::DW_FORM_udata, Imm);
1506 addBlock(VariableDie, dwarf::DW_AT_const_value, 0, Block);
1508 //FIXME : Handle other operand types.
1514 MachineLocation Location;
1516 int Offset = RI->getFrameIndexReference(*MF, DV->getFrameIndex(), FrameReg);
1517 Location.set(FrameReg, Offset);
1519 if (VD.hasComplexAddress())
1520 addComplexAddress(DV, VariableDie, dwarf::DW_AT_location, Location);
1521 else if (VD.isBlockByrefVariable())
1522 addBlockByrefAddress(DV, VariableDie, dwarf::DW_AT_location, Location);
1524 addAddress(VariableDie, dwarf::DW_AT_location, Location);
1528 if (Tag == dwarf::DW_TAG_formal_parameter && VD.getType().isArtificial())
1529 addUInt(VariableDie, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1);
1530 DV->setDIE(VariableDie);
1535 void DwarfDebug::addPubTypes(DISubprogram SP) {
1536 DICompositeType SPTy = SP.getType();
1537 unsigned SPTag = SPTy.getTag();
1538 if (SPTag != dwarf::DW_TAG_subroutine_type)
1541 DIArray Args = SPTy.getTypeArray();
1542 for (unsigned i = 0, e = Args.getNumElements(); i != e; ++i) {
1543 DIType ATy(Args.getElement(i).getNode());
1546 DICompositeType CATy = getDICompositeType(ATy);
1547 if (DIDescriptor(CATy.getNode()).Verify() && !CATy.getName().empty()) {
1548 if (DIEEntry *Entry = ModuleCU->getDIEEntry(CATy.getNode()))
1549 ModuleCU->addGlobalType(CATy.getName(), Entry->getEntry());
1554 /// constructScopeDIE - Construct a DIE for this scope.
1555 DIE *DwarfDebug::constructScopeDIE(DbgScope *Scope) {
1556 if (!Scope || !Scope->getScopeNode())
1559 DIScope DS(Scope->getScopeNode());
1560 DIE *ScopeDIE = NULL;
1561 if (Scope->getInlinedAt())
1562 ScopeDIE = constructInlinedScopeDIE(Scope);
1563 else if (DS.isSubprogram()) {
1564 if (Scope->isAbstractScope())
1565 ScopeDIE = ModuleCU->getDIE(DS.getNode());
1567 ScopeDIE = updateSubprogramScopeDIE(DS.getNode());
1570 ScopeDIE = constructLexicalScopeDIE(Scope);
1571 if (!ScopeDIE) return NULL;
1574 // Add variables to scope.
1575 const SmallVector<DbgVariable *, 8> &Variables = Scope->getVariables();
1576 for (unsigned i = 0, N = Variables.size(); i < N; ++i) {
1577 DIE *VariableDIE = constructVariableDIE(Variables[i], Scope);
1579 ScopeDIE->addChild(VariableDIE);
1582 // Add nested scopes.
1583 const SmallVector<DbgScope *, 4> &Scopes = Scope->getScopes();
1584 for (unsigned j = 0, M = Scopes.size(); j < M; ++j) {
1585 // Define the Scope debug information entry.
1586 DIE *NestedDIE = constructScopeDIE(Scopes[j]);
1588 ScopeDIE->addChild(NestedDIE);
1591 if (DS.isSubprogram())
1592 addPubTypes(DISubprogram(DS.getNode()));
1597 /// GetOrCreateSourceID - Look up the source id with the given directory and
1598 /// source file names. If none currently exists, create a new id and insert it
1599 /// in the SourceIds map. This can update DirectoryNames and SourceFileNames
1601 unsigned DwarfDebug::GetOrCreateSourceID(StringRef DirName, StringRef FileName) {
1603 StringMap<unsigned>::iterator DI = DirectoryIdMap.find(DirName);
1604 if (DI != DirectoryIdMap.end()) {
1605 DId = DI->getValue();
1607 DId = DirectoryNames.size() + 1;
1608 DirectoryIdMap[DirName] = DId;
1609 DirectoryNames.push_back(DirName);
1613 StringMap<unsigned>::iterator FI = SourceFileIdMap.find(FileName);
1614 if (FI != SourceFileIdMap.end()) {
1615 FId = FI->getValue();
1617 FId = SourceFileNames.size() + 1;
1618 SourceFileIdMap[FileName] = FId;
1619 SourceFileNames.push_back(FileName);
1622 DenseMap<std::pair<unsigned, unsigned>, unsigned>::iterator SI =
1623 SourceIdMap.find(std::make_pair(DId, FId));
1624 if (SI != SourceIdMap.end())
1627 unsigned SrcId = SourceIds.size() + 1; // DW_AT_decl_file cannot be 0.
1628 SourceIdMap[std::make_pair(DId, FId)] = SrcId;
1629 SourceIds.push_back(std::make_pair(DId, FId));
1634 /// getOrCreateNameSpace - Create a DIE for DINameSpace.
1635 DIE *DwarfDebug::getOrCreateNameSpace(DINameSpace NS) {
1636 DIE *NDie = ModuleCU->getDIE(NS.getNode());
1639 NDie = new DIE(dwarf::DW_TAG_namespace);
1640 ModuleCU->insertDIE(NS.getNode(), NDie);
1641 if (!NS.getName().empty())
1642 addString(NDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, NS.getName());
1643 addSourceLine(NDie, &NS);
1644 addToContextOwner(NDie, NS.getContext());
1648 void DwarfDebug::constructCompileUnit(MDNode *N) {
1649 DICompileUnit DIUnit(N);
1650 // Use first compile unit marked as isMain as the compile unit for this
1652 if (ModuleCU || !DIUnit.isMain())
1654 StringRef FN = DIUnit.getFilename();
1655 StringRef Dir = DIUnit.getDirectory();
1656 unsigned ID = GetOrCreateSourceID(Dir, FN);
1658 DIE *Die = new DIE(dwarf::DW_TAG_compile_unit);
1659 addString(Die, dwarf::DW_AT_producer, dwarf::DW_FORM_string,
1660 DIUnit.getProducer());
1661 addUInt(Die, dwarf::DW_AT_language, dwarf::DW_FORM_data1,
1662 DIUnit.getLanguage());
1663 addString(Die, dwarf::DW_AT_name, dwarf::DW_FORM_string, FN);
1664 addLabel(Die, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
1665 getTempLabel("text_begin"));
1666 addLabel(Die, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
1667 getTempLabel("text_end"));
1668 // DW_AT_stmt_list is a offset of line number information for this
1669 // compile unit in debug_line section. It is always zero when only one
1670 // compile unit is emitted in one object file.
1671 addUInt(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4, 0);
1674 addString(Die, dwarf::DW_AT_comp_dir, dwarf::DW_FORM_string, Dir);
1675 if (DIUnit.isOptimized())
1676 addUInt(Die, dwarf::DW_AT_APPLE_optimized, dwarf::DW_FORM_flag, 1);
1678 StringRef Flags = DIUnit.getFlags();
1680 addString(Die, dwarf::DW_AT_APPLE_flags, dwarf::DW_FORM_string, Flags);
1682 unsigned RVer = DIUnit.getRunTimeVersion();
1684 addUInt(Die, dwarf::DW_AT_APPLE_major_runtime_vers,
1685 dwarf::DW_FORM_data1, RVer);
1688 "ModuleCU assigned since the top of constructCompileUnit");
1689 ModuleCU = new CompileUnit(ID, Die);
1692 void DwarfDebug::constructGlobalVariableDIE(MDNode *N) {
1693 DIGlobalVariable DI_GV(N);
1695 // If debug information is malformed then ignore it.
1696 if (DI_GV.Verify() == false)
1699 // Check for pre-existence.
1700 if (ModuleCU->getDIE(DI_GV.getNode()))
1703 DIE *VariableDie = createGlobalVariableDIE(DI_GV);
1708 ModuleCU->insertDIE(N, VariableDie);
1710 // Add to context owner.
1711 DIDescriptor GVContext = DI_GV.getContext();
1712 // Do not create specification DIE if context is either compile unit
1714 if (DI_GV.isDefinition() && !GVContext.isCompileUnit()
1715 && !GVContext.isFile() && !GVContext.isSubprogram()) {
1716 // Create specification DIE.
1717 DIE *VariableSpecDIE = new DIE(dwarf::DW_TAG_variable);
1718 addDIEEntry(VariableSpecDIE, dwarf::DW_AT_specification,
1719 dwarf::DW_FORM_ref4, VariableDie);
1720 DIEBlock *Block = new DIEBlock();
1721 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr);
1722 addLabel(Block, 0, dwarf::DW_FORM_udata,
1723 Asm->Mang->getSymbol(DI_GV.getGlobal()));
1724 addBlock(VariableSpecDIE, dwarf::DW_AT_location, 0, Block);
1725 addUInt(VariableDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
1726 ModuleCU->addDie(VariableSpecDIE);
1728 DIEBlock *Block = new DIEBlock();
1729 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr);
1730 addLabel(Block, 0, dwarf::DW_FORM_udata,
1731 Asm->Mang->getSymbol(DI_GV.getGlobal()));
1732 addBlock(VariableDie, dwarf::DW_AT_location, 0, Block);
1734 addToContextOwner(VariableDie, GVContext);
1736 // Expose as global. FIXME - need to check external flag.
1737 ModuleCU->addGlobal(DI_GV.getName(), VariableDie);
1739 DIType GTy = DI_GV.getType();
1740 if (GTy.isCompositeType() && !GTy.getName().empty()) {
1741 DIEEntry *Entry = ModuleCU->getDIEEntry(GTy.getNode());
1742 assert (Entry && "Missing global type!");
1743 ModuleCU->addGlobalType(GTy.getName(), Entry->getEntry());
1748 void DwarfDebug::constructSubprogramDIE(MDNode *N) {
1751 // Check for pre-existence.
1752 if (ModuleCU->getDIE(N))
1755 if (!SP.isDefinition())
1756 // This is a method declaration which will be handled while constructing
1760 DIE *SubprogramDie = createSubprogramDIE(SP);
1763 ModuleCU->insertDIE(N, SubprogramDie);
1765 // Add to context owner.
1766 addToContextOwner(SubprogramDie, SP.getContext());
1768 // Expose as global.
1769 ModuleCU->addGlobal(SP.getName(), SubprogramDie);
1774 /// beginModule - Emit all Dwarf sections that should come prior to the
1775 /// content. Create global DIEs and emit initial debug info sections.
1776 /// This is inovked by the target AsmPrinter.
1777 void DwarfDebug::beginModule(Module *M, MachineModuleInfo *mmi) {
1780 if (TimePassesIsEnabled)
1781 DebugTimer->startTimer();
1783 if (!MAI->doesSupportDebugInformation())
1786 DebugInfoFinder DbgFinder;
1787 DbgFinder.processModule(*M);
1789 // Create all the compile unit DIEs.
1790 for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(),
1791 E = DbgFinder.compile_unit_end(); I != E; ++I)
1792 constructCompileUnit(*I);
1797 // Create DIEs for each subprogram.
1798 for (DebugInfoFinder::iterator I = DbgFinder.subprogram_begin(),
1799 E = DbgFinder.subprogram_end(); I != E; ++I)
1800 constructSubprogramDIE(*I);
1802 // Create DIEs for each global variable.
1803 for (DebugInfoFinder::iterator I = DbgFinder.global_variable_begin(),
1804 E = DbgFinder.global_variable_end(); I != E; ++I)
1805 constructGlobalVariableDIE(*I);
1809 MMI->setDebugInfoAvailability(true);
1811 // Prime section data.
1812 SectionMap.insert(Asm->getObjFileLowering().getTextSection());
1814 // Print out .file directives to specify files for .loc directives. These are
1815 // printed out early so that they precede any .loc directives.
1816 if (MAI->hasDotLocAndDotFile()) {
1817 for (unsigned i = 1, e = getNumSourceIds()+1; i != e; ++i) {
1818 // Remember source id starts at 1.
1819 std::pair<unsigned, unsigned> Id = getSourceDirectoryAndFileIds(i);
1820 // FIXME: don't use sys::path for this! This should not depend on the
1822 sys::Path FullPath(getSourceDirectoryName(Id.first));
1824 FullPath.appendComponent(getSourceFileName(Id.second));
1825 assert(AppendOk && "Could not append filename to directory!");
1827 Asm->OutStreamer.EmitDwarfFileDirective(i, FullPath.str());
1831 // Emit initial sections
1834 if (TimePassesIsEnabled)
1835 DebugTimer->stopTimer();
1838 /// endModule - Emit all Dwarf sections that should come after the content.
1840 void DwarfDebug::endModule() {
1844 if (TimePassesIsEnabled)
1845 DebugTimer->startTimer();
1847 // Attach DW_AT_inline attribute with inlined subprogram DIEs.
1848 for (SmallPtrSet<DIE *, 4>::iterator AI = InlinedSubprogramDIEs.begin(),
1849 AE = InlinedSubprogramDIEs.end(); AI != AE; ++AI) {
1851 addUInt(ISP, dwarf::DW_AT_inline, 0, dwarf::DW_INL_inlined);
1854 // Insert top level DIEs.
1855 for (SmallVector<DIE *, 4>::iterator TI = TopLevelDIEsVector.begin(),
1856 TE = TopLevelDIEsVector.end(); TI != TE; ++TI)
1857 ModuleCU->getCUDie()->addChild(*TI);
1859 for (DenseMap<DIE *, MDNode *>::iterator CI = ContainingTypeMap.begin(),
1860 CE = ContainingTypeMap.end(); CI != CE; ++CI) {
1861 DIE *SPDie = CI->first;
1862 MDNode *N = dyn_cast_or_null<MDNode>(CI->second);
1864 DIE *NDie = ModuleCU->getDIE(N);
1865 if (!NDie) continue;
1866 addDIEEntry(SPDie, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4, NDie);
1867 // FIXME - This is not the correct approach.
1868 // addDIEEntry(NDie, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4, NDie);
1871 // Standard sections final addresses.
1872 Asm->OutStreamer.SwitchSection(Asm->getObjFileLowering().getTextSection());
1873 Asm->OutStreamer.EmitLabel(getTempLabel("text_end"));
1874 Asm->OutStreamer.SwitchSection(Asm->getObjFileLowering().getDataSection());
1875 Asm->OutStreamer.EmitLabel(getTempLabel("data_end"));
1877 // End text sections.
1878 for (unsigned i = 1, N = SectionMap.size(); i <= N; ++i) {
1879 Asm->OutStreamer.SwitchSection(SectionMap[i]);
1880 Asm->OutStreamer.EmitLabel(getDWLabel("section_end", i));
1883 // Emit common frame information.
1884 emitCommonDebugFrame();
1886 // Emit function debug frame information
1887 for (std::vector<FunctionDebugFrameInfo>::iterator I = DebugFrames.begin(),
1888 E = DebugFrames.end(); I != E; ++I)
1889 emitFunctionDebugFrame(*I);
1891 // Compute DIE offsets and sizes.
1892 computeSizeAndOffsets();
1894 // Emit all the DIEs into a debug info section
1897 // Corresponding abbreviations into a abbrev section.
1898 emitAbbreviations();
1900 // Emit source line correspondence into a debug line section.
1903 // Emit info into a debug pubnames section.
1904 emitDebugPubNames();
1906 // Emit info into a debug pubtypes section.
1907 emitDebugPubTypes();
1909 // Emit info into a debug loc section.
1912 // Emit info into a debug aranges section.
1915 // Emit info into a debug ranges section.
1918 // Emit info into a debug macinfo section.
1921 // Emit inline info.
1922 emitDebugInlineInfo();
1924 // Emit info into a debug str section.
1928 ModuleCU = NULL; // Reset for the next Module, if any.
1930 if (TimePassesIsEnabled)
1931 DebugTimer->stopTimer();
1934 /// findAbstractVariable - Find abstract variable, if any, associated with Var.
1935 DbgVariable *DwarfDebug::findAbstractVariable(DIVariable &Var,
1937 DILocation &ScopeLoc) {
1939 DbgVariable *AbsDbgVariable = AbstractVariables.lookup(Var.getNode());
1941 return AbsDbgVariable;
1943 DbgScope *Scope = AbstractScopes.lookup(ScopeLoc.getScope().getNode());
1947 AbsDbgVariable = new DbgVariable(Var, FrameIdx,
1948 NULL /* No more-abstract variable*/);
1949 Scope->addVariable(AbsDbgVariable);
1950 AbstractVariables[Var.getNode()] = AbsDbgVariable;
1951 return AbsDbgVariable;
1954 /// findAbstractVariable - Find abstract variable, if any, associated with Var.
1955 /// FIXME : Refactor findAbstractVariable.
1956 DbgVariable *DwarfDebug::findAbstractVariable(DIVariable &Var,
1957 const MachineInstr *MI,
1958 DILocation &ScopeLoc) {
1960 DbgVariable *AbsDbgVariable = AbstractVariables.lookup(Var.getNode());
1962 return AbsDbgVariable;
1964 DbgScope *Scope = AbstractScopes.lookup(ScopeLoc.getScope().getNode());
1968 AbsDbgVariable = new DbgVariable(Var, MI,
1969 NULL /* No more-abstract variable*/);
1970 Scope->addVariable(AbsDbgVariable);
1971 AbstractVariables[Var.getNode()] = AbsDbgVariable;
1972 return AbsDbgVariable;
1975 /// collectVariableInfo - Populate DbgScope entries with variables' info.
1976 void DwarfDebug::collectVariableInfo() {
1979 MachineModuleInfo::VariableDbgInfoMapTy &VMap = MMI->getVariableDbgInfo();
1980 for (MachineModuleInfo::VariableDbgInfoMapTy::iterator VI = VMap.begin(),
1981 VE = VMap.end(); VI != VE; ++VI) {
1982 MDNode *Var = VI->first;
1984 DIVariable DV (Var);
1985 std::pair< unsigned, MDNode *> VP = VI->second;
1986 DILocation ScopeLoc(VP.second);
1989 ConcreteScopes.lookup(ScopeLoc.getOrigLocation().getNode());
1991 Scope = DbgScopeMap.lookup(ScopeLoc.getScope().getNode());
1992 // If variable scope is not found then skip this variable.
1996 DbgVariable *AbsDbgVariable = findAbstractVariable(DV, VP.first, ScopeLoc);
1997 DbgVariable *RegVar = new DbgVariable(DV, VP.first, AbsDbgVariable);
1998 Scope->addVariable(RegVar);
2001 // Collect variable information from DBG_VALUE machine instructions;
2002 for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
2004 for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
2006 const MachineInstr *MInsn = II;
2007 if (MInsn->getOpcode() != TargetOpcode::DBG_VALUE)
2009 // FIXME : Lift this restriction.
2010 if (MInsn->getNumOperands() != 3)
2012 DIVariable DV((MDNode*)(MInsn->getOperand(MInsn->getNumOperands() - 1).getMetadata()));
2013 if (DV.getTag() == dwarf::DW_TAG_arg_variable) {
2014 // FIXME Handle inlined subroutine arguments.
2015 DbgVariable *ArgVar = new DbgVariable(DV, MInsn, NULL);
2016 CurrentFnDbgScope->addVariable(ArgVar);
2020 DebugLoc DL = MInsn->getDebugLoc();
2021 if (DL.isUnknown()) continue;
2022 DILocation ScopeLoc = MF->getDILocation(DL);
2024 ConcreteScopes.lookup(ScopeLoc.getOrigLocation().getNode());
2026 Scope = DbgScopeMap.lookup(ScopeLoc.getScope().getNode());
2027 // If variable scope is not found then skip this variable.
2031 DbgVariable *AbsDbgVariable = findAbstractVariable(DV, MInsn,
2033 DbgVariable *RegVar = new DbgVariable(DV, MInsn, AbsDbgVariable);
2034 Scope->addVariable(RegVar);
2039 /// beginScope - Process beginning of a scope.
2040 void DwarfDebug::beginScope(const MachineInstr *MI) {
2041 // Ignore DBG_VALUE instructions.
2042 if (MI->getOpcode() == TargetOpcode::DBG_VALUE)
2046 DebugLoc DL = MI->getDebugLoc();
2049 DILocation DILoc = MF->getDILocation(DL);
2050 if (!DILoc.getScope().Verify())
2053 // Check and update last known location info.
2054 if(DILoc.getNode() == PrevDILoc)
2056 PrevDILoc = DILoc.getNode();
2058 // Emit a label to indicate location change. This is used for line
2059 // table even if this instruction does start a new scope.
2060 MCSymbol *Label = recordSourceLine(DILoc.getLineNumber(),
2061 DILoc.getColumnNumber(),
2062 DILoc.getScope().getNode());
2064 // update DbgScope if this instruction starts a new scope.
2065 InsnToDbgScopeMapTy::iterator I = DbgScopeBeginMap.find(MI);
2066 if (I == DbgScopeBeginMap.end())
2069 ScopeVector &SD = I->second;
2070 for (ScopeVector::iterator SDI = SD.begin(), SDE = SD.end();
2072 (*SDI)->setStartLabel(Label);
2076 /// endScope - Process end of a scope.
2077 void DwarfDebug::endScope(const MachineInstr *MI) {
2078 // Ignore DBG_VALUE instruction.
2079 if (MI->getOpcode() == TargetOpcode::DBG_VALUE)
2083 DebugLoc DL = MI->getDebugLoc();
2086 DILocation DILoc = MF->getDILocation(DL);
2087 if (!DILoc.getScope().Verify())
2090 // Emit a label and update DbgScope if this instruction ends a scope.
2091 InsnToDbgScopeMapTy::iterator I = DbgScopeEndMap.find(MI);
2092 if (I == DbgScopeEndMap.end())
2095 MCSymbol *Label = MMI->getContext().CreateTempSymbol();
2096 Asm->OutStreamer.EmitLabel(Label);
2098 SmallVector<DbgScope*, 2> &SD = I->second;
2099 for (SmallVector<DbgScope *, 2>::iterator SDI = SD.begin(), SDE = SD.end();
2101 (*SDI)->setEndLabel(Label);
2105 /// createDbgScope - Create DbgScope for the scope.
2106 void DwarfDebug::createDbgScope(MDNode *Scope, MDNode *InlinedAt) {
2109 DbgScope *WScope = DbgScopeMap.lookup(Scope);
2112 WScope = new DbgScope(NULL, DIDescriptor(Scope), NULL);
2113 DbgScopeMap.insert(std::make_pair(Scope, WScope));
2114 if (DIDescriptor(Scope).isLexicalBlock())
2115 createDbgScope(DILexicalBlock(Scope).getContext().getNode(), NULL);
2119 DbgScope *WScope = DbgScopeMap.lookup(InlinedAt);
2123 WScope = new DbgScope(NULL, DIDescriptor(Scope), InlinedAt);
2124 DbgScopeMap.insert(std::make_pair(InlinedAt, WScope));
2125 DILocation DL(InlinedAt);
2126 createDbgScope(DL.getScope().getNode(), DL.getOrigLocation().getNode());
2129 /// extractScopeInformation - Scan machine instructions in this function
2130 /// and collect DbgScopes. Return true, if atleast one scope was found.
2131 bool DwarfDebug::extractScopeInformation() {
2132 // If scope information was extracted using .dbg intrinsics then there is not
2133 // any need to extract these information by scanning each instruction.
2134 if (!DbgScopeMap.empty())
2137 DenseMap<const MachineInstr *, unsigned> MIIndexMap;
2138 unsigned MIIndex = 0;
2139 // Scan each instruction and create scopes. First build working set of scopes.
2140 for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
2142 for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
2144 const MachineInstr *MInsn = II;
2145 // FIXME : Remove DBG_VALUE check.
2146 if (MInsn->getOpcode() == TargetOpcode::DBG_VALUE) continue;
2147 MIIndexMap[MInsn] = MIIndex++;
2148 DebugLoc DL = MInsn->getDebugLoc();
2149 if (DL.isUnknown()) continue;
2150 DILocation DLT = MF->getDILocation(DL);
2151 DIScope DLTScope = DLT.getScope();
2152 // There is no need to create another DIE for compile unit. For all
2153 // other scopes, create one DbgScope now. This will be translated
2154 // into a scope DIE at the end.
2155 if (DLTScope.isCompileUnit()) continue;
2156 createDbgScope(DLTScope.getNode(), DLT.getOrigLocation().getNode());
2161 // Build scope hierarchy using working set of scopes.
2162 for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
2164 for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
2166 const MachineInstr *MInsn = II;
2167 // FIXME : Remove DBG_VALUE check.
2168 if (MInsn->getOpcode() == TargetOpcode::DBG_VALUE) continue;
2169 DebugLoc DL = MInsn->getDebugLoc();
2170 if (DL.isUnknown()) continue;
2171 DILocation DLT = MF->getDILocation(DL);
2172 DIScope DLTScope = DLT.getScope();
2173 // There is no need to create another DIE for compile unit. For all
2174 // other scopes, create one DbgScope now. This will be translated
2175 // into a scope DIE at the end.
2176 if (DLTScope.isCompileUnit()) continue;
2177 DbgScope *Scope = getUpdatedDbgScope(DLTScope.getNode(), MInsn,
2178 DLT.getOrigLocation().getNode());
2179 Scope->setLastInsn(MInsn);
2183 if (!CurrentFnDbgScope)
2186 CurrentFnDbgScope->fixInstructionMarkers(MIIndexMap);
2188 // Each scope has first instruction and last instruction to mark beginning
2189 // and end of a scope respectively. Create an inverse map that list scopes
2190 // starts (and ends) with an instruction. One instruction may start (or end)
2191 // multiple scopes. Ignore scopes that are not reachable.
2192 SmallVector<DbgScope *, 4> WorkList;
2193 WorkList.push_back(CurrentFnDbgScope);
2194 while (!WorkList.empty()) {
2195 DbgScope *S = WorkList.back(); WorkList.pop_back();
2197 const SmallVector<DbgScope *, 4> &Children = S->getScopes();
2198 if (!Children.empty())
2199 for (SmallVector<DbgScope *, 4>::const_iterator SI = Children.begin(),
2200 SE = Children.end(); SI != SE; ++SI)
2201 WorkList.push_back(*SI);
2203 if (S->isAbstractScope())
2205 const MachineInstr *MI = S->getFirstInsn();
2206 assert (MI && "DbgScope does not have first instruction!");
2208 InsnToDbgScopeMapTy::iterator IDI = DbgScopeBeginMap.find(MI);
2209 if (IDI != DbgScopeBeginMap.end())
2210 IDI->second.push_back(S);
2212 DbgScopeBeginMap[MI].push_back(S);
2214 MI = S->getLastInsn();
2215 assert (MI && "DbgScope does not have last instruction!");
2216 IDI = DbgScopeEndMap.find(MI);
2217 if (IDI != DbgScopeEndMap.end())
2218 IDI->second.push_back(S);
2220 DbgScopeEndMap[MI].push_back(S);
2223 return !DbgScopeMap.empty();
2226 /// beginFunction - Gather pre-function debug information. Assumes being
2227 /// emitted immediately after the function entry point.
2228 void DwarfDebug::beginFunction(const MachineFunction *MF) {
2231 if (!ShouldEmitDwarfDebug()) return;
2233 if (TimePassesIsEnabled)
2234 DebugTimer->startTimer();
2236 if (!extractScopeInformation())
2239 collectVariableInfo();
2241 // Assumes in correct section after the entry point.
2242 Asm->OutStreamer.EmitLabel(getDWLabel("func_begin", ++SubprogramCount));
2244 // Emit label for the implicitly defined dbg.stoppoint at the start of the
2246 DebugLoc FDL = MF->getDefaultDebugLoc();
2247 if (!FDL.isUnknown()) {
2248 DILocation DLT = MF->getDILocation(FDL);
2249 DISubprogram SP = getDISubprogram(DLT.getScope().getNode());
2252 Line = SP.getLineNumber();
2255 Line = DLT.getLineNumber();
2256 Col = DLT.getColumnNumber();
2259 recordSourceLine(Line, Col, DLT.getScope().getNode());
2261 if (TimePassesIsEnabled)
2262 DebugTimer->stopTimer();
2265 /// endFunction - Gather and emit post-function debug information.
2267 void DwarfDebug::endFunction(const MachineFunction *MF) {
2268 if (!ShouldEmitDwarfDebug()) return;
2270 if (TimePassesIsEnabled)
2271 DebugTimer->startTimer();
2273 if (DbgScopeMap.empty())
2276 if (CurrentFnDbgScope) {
2277 // Define end label for subprogram.
2278 Asm->OutStreamer.EmitLabel(getDWLabel("func_end", SubprogramCount));
2280 // Get function line info.
2281 if (!Lines.empty()) {
2282 // Get section line info.
2283 unsigned ID = SectionMap.insert(Asm->getCurrentSection());
2284 if (SectionSourceLines.size() < ID) SectionSourceLines.resize(ID);
2285 std::vector<SrcLineInfo> &SectionLineInfos = SectionSourceLines[ID-1];
2286 // Append the function info to section info.
2287 SectionLineInfos.insert(SectionLineInfos.end(),
2288 Lines.begin(), Lines.end());
2291 // Construct abstract scopes.
2292 for (SmallVector<DbgScope *, 4>::iterator AI = AbstractScopesList.begin(),
2293 AE = AbstractScopesList.end(); AI != AE; ++AI)
2294 constructScopeDIE(*AI);
2296 constructScopeDIE(CurrentFnDbgScope);
2298 DebugFrames.push_back(FunctionDebugFrameInfo(SubprogramCount,
2299 MMI->getFrameMoves()));
2303 CurrentFnDbgScope = NULL;
2304 DeleteContainerSeconds(DbgScopeMap);
2305 DbgScopeBeginMap.clear();
2306 DbgScopeEndMap.clear();
2307 ConcreteScopes.clear();
2308 DeleteContainerSeconds(AbstractScopes);
2309 AbstractScopesList.clear();
2310 AbstractVariables.clear();
2313 if (TimePassesIsEnabled)
2314 DebugTimer->stopTimer();
2317 /// recordSourceLine - Register a source line with debug info. Returns the
2318 /// unique label that was emitted and which provides correspondence to
2319 /// the source line list.
2320 MCSymbol *DwarfDebug::recordSourceLine(unsigned Line, unsigned Col, MDNode *S) {
2324 if (TimePassesIsEnabled)
2325 DebugTimer->startTimer();
2330 DIDescriptor Scope(S);
2331 if (Scope.isCompileUnit()) {
2332 DICompileUnit CU(S);
2333 Dir = CU.getDirectory();
2334 Fn = CU.getFilename();
2335 } else if (Scope.isSubprogram()) {
2337 Dir = SP.getDirectory();
2338 Fn = SP.getFilename();
2339 } else if (Scope.isLexicalBlock()) {
2340 DILexicalBlock DB(S);
2341 Dir = DB.getDirectory();
2342 Fn = DB.getFilename();
2344 assert(0 && "Unexpected scope info");
2346 unsigned Src = GetOrCreateSourceID(Dir, Fn);
2347 MCSymbol *Label = MMI->getContext().CreateTempSymbol();
2348 Lines.push_back(SrcLineInfo(Line, Col, Src, Label));
2350 if (TimePassesIsEnabled)
2351 DebugTimer->stopTimer();
2353 Asm->OutStreamer.EmitLabel(Label);
2357 /// getOrCreateSourceID - Public version of GetOrCreateSourceID. This can be
2358 /// timed. Look up the source id with the given directory and source file
2359 /// names. If none currently exists, create a new id and insert it in the
2360 /// SourceIds map. This can update DirectoryNames and SourceFileNames maps as
2362 unsigned DwarfDebug::getOrCreateSourceID(const std::string &DirName,
2363 const std::string &FileName) {
2364 if (TimePassesIsEnabled)
2365 DebugTimer->startTimer();
2367 unsigned SrcId = GetOrCreateSourceID(DirName.c_str(), FileName.c_str());
2369 if (TimePassesIsEnabled)
2370 DebugTimer->stopTimer();
2375 //===----------------------------------------------------------------------===//
2377 //===----------------------------------------------------------------------===//
2379 /// computeSizeAndOffset - Compute the size and offset of a DIE.
2382 DwarfDebug::computeSizeAndOffset(DIE *Die, unsigned Offset, bool Last) {
2383 // Get the children.
2384 const std::vector<DIE *> &Children = Die->getChildren();
2386 // If not last sibling and has children then add sibling offset attribute.
2387 if (!Last && !Children.empty())
2388 DIEValues.push_back(Die->addSiblingOffset());
2390 // Record the abbreviation.
2391 assignAbbrevNumber(Die->getAbbrev());
2393 // Get the abbreviation for this DIE.
2394 unsigned AbbrevNumber = Die->getAbbrevNumber();
2395 const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
2398 Die->setOffset(Offset);
2400 // Start the size with the size of abbreviation code.
2401 Offset += MCAsmInfo::getULEB128Size(AbbrevNumber);
2403 const SmallVector<DIEValue*, 32> &Values = Die->getValues();
2404 const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData();
2406 // Size the DIE attribute values.
2407 for (unsigned i = 0, N = Values.size(); i < N; ++i)
2408 // Size attribute value.
2409 Offset += Values[i]->SizeOf(TD, AbbrevData[i].getForm());
2411 // Size the DIE children if any.
2412 if (!Children.empty()) {
2413 assert(Abbrev->getChildrenFlag() == dwarf::DW_CHILDREN_yes &&
2414 "Children flag not set");
2416 for (unsigned j = 0, M = Children.size(); j < M; ++j)
2417 Offset = computeSizeAndOffset(Children[j], Offset, (j + 1) == M);
2419 // End of children marker.
2420 Offset += sizeof(int8_t);
2423 Die->setSize(Offset - Die->getOffset());
2427 /// computeSizeAndOffsets - Compute the size and offset of all the DIEs.
2429 void DwarfDebug::computeSizeAndOffsets() {
2430 // Compute size of compile unit header.
2431 static unsigned Offset =
2432 sizeof(int32_t) + // Length of Compilation Unit Info
2433 sizeof(int16_t) + // DWARF version number
2434 sizeof(int32_t) + // Offset Into Abbrev. Section
2435 sizeof(int8_t); // Pointer Size (in bytes)
2437 computeSizeAndOffset(ModuleCU->getCUDie(), Offset, true);
2438 CompileUnitOffsets[ModuleCU] = 0;
2441 /// emitInitial - Emit initial Dwarf declarations. This is necessary for cc
2442 /// tools to recognize the object file contains Dwarf information.
2443 void DwarfDebug::emitInitial() {
2444 // Check to see if we already emitted intial headers.
2445 if (didInitial) return;
2448 const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
2450 // Dwarf sections base addresses.
2451 if (MAI->doesDwarfRequireFrameSection()) {
2452 Asm->OutStreamer.SwitchSection(TLOF.getDwarfFrameSection());
2453 Asm->OutStreamer.EmitLabel(getTempLabel("section_debug_frame"));
2456 Asm->OutStreamer.SwitchSection(TLOF.getDwarfInfoSection());
2457 Asm->OutStreamer.EmitLabel(getTempLabel("section_info"));
2458 Asm->OutStreamer.SwitchSection(TLOF.getDwarfAbbrevSection());
2459 Asm->OutStreamer.EmitLabel(getTempLabel("section_abbrev"));
2460 Asm->OutStreamer.SwitchSection(TLOF.getDwarfARangesSection());
2461 Asm->OutStreamer.EmitLabel(getTempLabel("section_aranges"));
2463 if (const MCSection *LineInfoDirective = TLOF.getDwarfMacroInfoSection()) {
2464 Asm->OutStreamer.SwitchSection(LineInfoDirective);
2465 Asm->OutStreamer.EmitLabel(getTempLabel("section_macinfo"));
2468 Asm->OutStreamer.SwitchSection(TLOF.getDwarfLineSection());
2469 Asm->OutStreamer.EmitLabel(getTempLabel("section_line"));
2470 Asm->OutStreamer.SwitchSection(TLOF.getDwarfLocSection());
2471 Asm->OutStreamer.EmitLabel(getTempLabel("section_loc"));
2472 Asm->OutStreamer.SwitchSection(TLOF.getDwarfPubNamesSection());
2473 Asm->OutStreamer.EmitLabel(getTempLabel("section_pubnames"));
2474 Asm->OutStreamer.SwitchSection(TLOF.getDwarfPubTypesSection());
2475 Asm->OutStreamer.EmitLabel(getTempLabel("section_pubtypes"));
2476 Asm->OutStreamer.SwitchSection(TLOF.getDwarfStrSection());
2477 Asm->OutStreamer.EmitLabel(getTempLabel("section_str"));
2478 Asm->OutStreamer.SwitchSection(TLOF.getDwarfRangesSection());
2479 Asm->OutStreamer.EmitLabel(getTempLabel("section_ranges"));
2481 Asm->OutStreamer.SwitchSection(TLOF.getTextSection());
2482 Asm->OutStreamer.EmitLabel(getTempLabel("text_begin"));
2483 Asm->OutStreamer.SwitchSection(TLOF.getDataSection());
2484 Asm->OutStreamer.EmitLabel(getTempLabel("data_begin"));
2487 /// emitDIE - Recusively Emits a debug information entry.
2489 void DwarfDebug::emitDIE(DIE *Die) {
2490 // Get the abbreviation for this DIE.
2491 unsigned AbbrevNumber = Die->getAbbrevNumber();
2492 const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
2494 // Emit the code (index) for the abbreviation.
2495 if (Asm->VerboseAsm)
2496 Asm->OutStreamer.AddComment("Abbrev [" + Twine(AbbrevNumber) + "] 0x" +
2497 Twine::utohexstr(Die->getOffset()) + ":0x" +
2498 Twine::utohexstr(Die->getSize()) + " " +
2499 dwarf::TagString(Abbrev->getTag()));
2500 EmitULEB128(AbbrevNumber);
2502 const SmallVector<DIEValue*, 32> &Values = Die->getValues();
2503 const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData();
2505 // Emit the DIE attribute values.
2506 for (unsigned i = 0, N = Values.size(); i < N; ++i) {
2507 unsigned Attr = AbbrevData[i].getAttribute();
2508 unsigned Form = AbbrevData[i].getForm();
2509 assert(Form && "Too many attributes for DIE (check abbreviation)");
2511 if (Asm->VerboseAsm)
2512 Asm->OutStreamer.AddComment(dwarf::AttributeString(Attr));
2515 case dwarf::DW_AT_sibling:
2516 Asm->EmitInt32(Die->getSiblingOffset());
2518 case dwarf::DW_AT_abstract_origin: {
2519 DIEEntry *E = cast<DIEEntry>(Values[i]);
2520 DIE *Origin = E->getEntry();
2521 unsigned Addr = Origin->getOffset();
2522 Asm->EmitInt32(Addr);
2526 // Emit an attribute using the defined form.
2527 Values[i]->EmitValue(this, Form);
2532 // Emit the DIE children if any.
2533 if (Abbrev->getChildrenFlag() == dwarf::DW_CHILDREN_yes) {
2534 const std::vector<DIE *> &Children = Die->getChildren();
2536 for (unsigned j = 0, M = Children.size(); j < M; ++j)
2537 emitDIE(Children[j]);
2539 if (Asm->VerboseAsm)
2540 Asm->OutStreamer.AddComment("End Of Children Mark");
2545 /// emitDebugInfo - Emit the debug info section.
2547 void DwarfDebug::emitDebugInfo() {
2548 // Start debug info section.
2549 Asm->OutStreamer.SwitchSection(
2550 Asm->getObjFileLowering().getDwarfInfoSection());
2551 DIE *Die = ModuleCU->getCUDie();
2553 // Emit the compile units header.
2554 Asm->OutStreamer.EmitLabel(getDWLabel("info_begin", ModuleCU->getID()));
2556 // Emit size of content not including length itself
2557 unsigned ContentSize = Die->getSize() +
2558 sizeof(int16_t) + // DWARF version number
2559 sizeof(int32_t) + // Offset Into Abbrev. Section
2560 sizeof(int8_t) + // Pointer Size (in bytes)
2561 sizeof(int32_t); // FIXME - extra pad for gdb bug.
2563 Asm->OutStreamer.AddComment("Length of Compilation Unit Info");
2564 Asm->EmitInt32(ContentSize);
2565 Asm->OutStreamer.AddComment("DWARF version number");
2566 Asm->EmitInt16(dwarf::DWARF_VERSION);
2567 Asm->OutStreamer.AddComment("Offset Into Abbrev. Section");
2568 EmitSectionOffset(getTempLabel("abbrev_begin"),getTempLabel("section_abbrev"),
2570 Asm->OutStreamer.AddComment("Address Size (in bytes)");
2571 Asm->EmitInt8(TD->getPointerSize());
2574 // FIXME - extra padding for gdb bug.
2575 Asm->OutStreamer.AddComment("4 extra padding bytes for GDB");
2580 Asm->OutStreamer.EmitLabel(getDWLabel("info_end", ModuleCU->getID()));
2583 /// emitAbbreviations - Emit the abbreviation section.
2585 void DwarfDebug::emitAbbreviations() const {
2586 // Check to see if it is worth the effort.
2587 if (!Abbreviations.empty()) {
2588 // Start the debug abbrev section.
2589 Asm->OutStreamer.SwitchSection(
2590 Asm->getObjFileLowering().getDwarfAbbrevSection());
2592 Asm->OutStreamer.EmitLabel(getTempLabel("abbrev_begin"));
2594 // For each abbrevation.
2595 for (unsigned i = 0, N = Abbreviations.size(); i < N; ++i) {
2596 // Get abbreviation data
2597 const DIEAbbrev *Abbrev = Abbreviations[i];
2599 // Emit the abbrevations code (base 1 index.)
2600 EmitULEB128(Abbrev->getNumber(), "Abbreviation Code");
2602 // Emit the abbreviations data.
2606 // Mark end of abbreviations.
2607 EmitULEB128(0, "EOM(3)");
2609 Asm->OutStreamer.EmitLabel(getTempLabel("abbrev_end"));
2613 /// emitEndOfLineMatrix - Emit the last address of the section and the end of
2614 /// the line matrix.
2616 void DwarfDebug::emitEndOfLineMatrix(unsigned SectionEnd) {
2617 // Define last address of section.
2618 Asm->OutStreamer.AddComment("Extended Op");
2621 Asm->OutStreamer.AddComment("Op size");
2622 Asm->EmitInt8(TD->getPointerSize() + 1);
2623 Asm->OutStreamer.AddComment("DW_LNE_set_address");
2624 Asm->EmitInt8(dwarf::DW_LNE_set_address);
2626 Asm->OutStreamer.AddComment("Section end label");
2628 Asm->OutStreamer.EmitSymbolValue(getDWLabel("section_end", SectionEnd),
2629 TD->getPointerSize(), 0/*AddrSpace*/);
2631 // Mark end of matrix.
2632 Asm->OutStreamer.AddComment("DW_LNE_end_sequence");
2638 /// emitDebugLines - Emit source line information.
2640 void DwarfDebug::emitDebugLines() {
2641 // If the target is using .loc/.file, the assembler will be emitting the
2642 // .debug_line table automatically.
2643 if (MAI->hasDotLocAndDotFile())
2646 // Minimum line delta, thus ranging from -10..(255-10).
2647 const int MinLineDelta = -(dwarf::DW_LNS_fixed_advance_pc + 1);
2648 // Maximum line delta, thus ranging from -10..(255-10).
2649 const int MaxLineDelta = 255 + MinLineDelta;
2651 // Start the dwarf line section.
2652 Asm->OutStreamer.SwitchSection(
2653 Asm->getObjFileLowering().getDwarfLineSection());
2655 // Construct the section header.
2656 Asm->OutStreamer.AddComment("Length of Source Line Info");
2657 EmitDifference(getTempLabel("line_end"), getTempLabel("line_begin"), true);
2658 Asm->OutStreamer.EmitLabel(getTempLabel("line_begin"));
2660 Asm->OutStreamer.AddComment("DWARF version number");
2661 Asm->EmitInt16(dwarf::DWARF_VERSION);
2663 Asm->OutStreamer.AddComment("Prolog Length");
2664 EmitDifference(getTempLabel("line_prolog_end"),
2665 getTempLabel("line_prolog_begin"), true);
2666 Asm->OutStreamer.EmitLabel(getTempLabel("line_prolog_begin"));
2668 Asm->OutStreamer.AddComment("Minimum Instruction Length");
2670 Asm->OutStreamer.AddComment("Default is_stmt_start flag");
2672 Asm->OutStreamer.AddComment("Line Base Value (Special Opcodes)");
2673 Asm->EmitInt8(MinLineDelta);
2674 Asm->OutStreamer.AddComment("Line Range Value (Special Opcodes)");
2675 Asm->EmitInt8(MaxLineDelta);
2676 Asm->OutStreamer.AddComment("Special Opcode Base");
2677 Asm->EmitInt8(-MinLineDelta);
2679 // Line number standard opcode encodings argument count
2680 Asm->OutStreamer.AddComment("DW_LNS_copy arg count");
2682 Asm->OutStreamer.AddComment("DW_LNS_advance_pc arg count");
2684 Asm->OutStreamer.AddComment("DW_LNS_advance_line arg count");
2686 Asm->OutStreamer.AddComment("DW_LNS_set_file arg count");
2688 Asm->OutStreamer.AddComment("DW_LNS_set_column arg count");
2690 Asm->OutStreamer.AddComment("DW_LNS_negate_stmt arg count");
2692 Asm->OutStreamer.AddComment("DW_LNS_set_basic_block arg count");
2694 Asm->OutStreamer.AddComment("DW_LNS_const_add_pc arg count");
2696 Asm->OutStreamer.AddComment("DW_LNS_fixed_advance_pc arg count");
2699 // Emit directories.
2700 for (unsigned DI = 1, DE = getNumSourceDirectories()+1; DI != DE; ++DI) {
2701 const std::string &Dir = getSourceDirectoryName(DI);
2702 if (Asm->VerboseAsm) Asm->OutStreamer.AddComment("Directory");
2703 Asm->OutStreamer.EmitBytes(StringRef(Dir.c_str(), Dir.size()+1), 0);
2706 Asm->OutStreamer.AddComment("End of directories");
2710 for (unsigned SI = 1, SE = getNumSourceIds()+1; SI != SE; ++SI) {
2711 // Remember source id starts at 1.
2712 std::pair<unsigned, unsigned> Id = getSourceDirectoryAndFileIds(SI);
2713 const std::string &FN = getSourceFileName(Id.second);
2714 if (Asm->VerboseAsm) Asm->OutStreamer.AddComment("Source");
2715 Asm->OutStreamer.EmitBytes(StringRef(FN.c_str(), FN.size()+1), 0);
2717 EmitULEB128(Id.first, "Directory #");
2718 EmitULEB128(0, "Mod date");
2719 EmitULEB128(0, "File size");
2722 Asm->OutStreamer.AddComment("End of files");
2725 Asm->OutStreamer.EmitLabel(getTempLabel("line_prolog_end"));
2727 // A sequence for each text section.
2728 unsigned SecSrcLinesSize = SectionSourceLines.size();
2730 for (unsigned j = 0; j < SecSrcLinesSize; ++j) {
2731 // Isolate current sections line info.
2732 const std::vector<SrcLineInfo> &LineInfos = SectionSourceLines[j];
2734 // Dwarf assumes we start with first line of first source file.
2735 unsigned Source = 1;
2738 // Construct rows of the address, source, line, column matrix.
2739 for (unsigned i = 0, N = LineInfos.size(); i < N; ++i) {
2740 const SrcLineInfo &LineInfo = LineInfos[i];
2741 MCSymbol *Label = LineInfo.getLabel();
2742 if (!Label->isDefined()) continue; // Not emitted, in dead code.
2744 if (LineInfo.getLine() == 0) continue;
2746 if (Asm->isVerbose()) {
2747 std::pair<unsigned, unsigned> SrcID =
2748 getSourceDirectoryAndFileIds(LineInfo.getSourceID());
2749 Asm->OutStreamer.AddComment(Twine(getSourceDirectoryName(SrcID.first)) +
2751 Twine(getSourceFileName(SrcID.second)) +
2752 ":" + Twine(LineInfo.getLine()));
2755 // Define the line address.
2756 Asm->OutStreamer.AddComment("Extended Op");
2758 Asm->OutStreamer.AddComment("Op size");
2759 Asm->EmitInt8(TD->getPointerSize() + 1);
2761 Asm->OutStreamer.AddComment("DW_LNE_set_address");
2762 Asm->EmitInt8(dwarf::DW_LNE_set_address);
2764 Asm->OutStreamer.AddComment("Location label");
2765 Asm->OutStreamer.EmitSymbolValue(Label, TD->getPointerSize(),
2768 // If change of source, then switch to the new source.
2769 if (Source != LineInfo.getSourceID()) {
2770 Source = LineInfo.getSourceID();
2771 Asm->OutStreamer.AddComment("DW_LNS_set_file");
2772 Asm->EmitInt8(dwarf::DW_LNS_set_file);
2773 EmitULEB128(Source, "New Source");
2776 // If change of line.
2777 if (Line != LineInfo.getLine()) {
2778 // Determine offset.
2779 int Offset = LineInfo.getLine() - Line;
2780 int Delta = Offset - MinLineDelta;
2783 Line = LineInfo.getLine();
2785 // If delta is small enough and in range...
2786 if (Delta >= 0 && Delta < (MaxLineDelta - 1)) {
2787 // ... then use fast opcode.
2788 Asm->OutStreamer.AddComment("Line Delta");
2789 Asm->EmitInt8(Delta - MinLineDelta);
2791 // ... otherwise use long hand.
2792 Asm->OutStreamer.AddComment("DW_LNS_advance_line");
2793 Asm->EmitInt8(dwarf::DW_LNS_advance_line);
2794 EmitSLEB128(Offset, "Line Offset");
2795 Asm->OutStreamer.AddComment("DW_LNS_copy");
2796 Asm->EmitInt8(dwarf::DW_LNS_copy);
2799 // Copy the previous row (different address or source)
2800 Asm->OutStreamer.AddComment("DW_LNS_copy");
2801 Asm->EmitInt8(dwarf::DW_LNS_copy);
2805 emitEndOfLineMatrix(j + 1);
2808 if (SecSrcLinesSize == 0)
2809 // Because we're emitting a debug_line section, we still need a line
2810 // table. The linker and friends expect it to exist. If there's nothing to
2811 // put into it, emit an empty table.
2812 emitEndOfLineMatrix(1);
2814 Asm->OutStreamer.EmitLabel(getTempLabel("line_end"));
2817 /// emitCommonDebugFrame - Emit common frame info into a debug frame section.
2819 void DwarfDebug::emitCommonDebugFrame() {
2820 if (!MAI->doesDwarfRequireFrameSection())
2824 Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
2825 TargetFrameInfo::StackGrowsUp ?
2826 TD->getPointerSize() : -TD->getPointerSize();
2828 // Start the dwarf frame section.
2829 Asm->OutStreamer.SwitchSection(
2830 Asm->getObjFileLowering().getDwarfFrameSection());
2832 Asm->OutStreamer.EmitLabel(getTempLabel("debug_frame_common"));
2833 Asm->OutStreamer.AddComment("Length of Common Information Entry");
2834 EmitDifference(getTempLabel("debug_frame_common_end"),
2835 getTempLabel("debug_frame_common_begin"), true);
2837 Asm->OutStreamer.EmitLabel(getTempLabel("debug_frame_common_begin"));
2838 Asm->OutStreamer.AddComment("CIE Identifier Tag");
2839 Asm->EmitInt32((int)dwarf::DW_CIE_ID);
2840 Asm->OutStreamer.AddComment("CIE Version");
2841 Asm->EmitInt8(dwarf::DW_CIE_VERSION);
2842 Asm->OutStreamer.AddComment("CIE Augmentation");
2843 Asm->OutStreamer.EmitIntValue(0, 1, /*addrspace*/0); // nul terminator.
2844 EmitULEB128(1, "CIE Code Alignment Factor");
2845 EmitSLEB128(stackGrowth, "CIE Data Alignment Factor");
2846 Asm->OutStreamer.AddComment("CIE RA Column");
2847 Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), false));
2849 std::vector<MachineMove> Moves;
2850 RI->getInitialFrameState(Moves);
2852 EmitFrameMoves(0, Moves, false);
2854 Asm->EmitAlignment(2, 0, 0, false);
2855 Asm->OutStreamer.EmitLabel(getTempLabel("debug_frame_common_end"));
2858 /// emitFunctionDebugFrame - Emit per function frame info into a debug frame
2861 emitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo) {
2862 if (!MAI->doesDwarfRequireFrameSection())
2865 // Start the dwarf frame section.
2866 Asm->OutStreamer.SwitchSection(
2867 Asm->getObjFileLowering().getDwarfFrameSection());
2869 Asm->OutStreamer.AddComment("Length of Frame Information Entry");
2870 MCSymbol *DebugFrameBegin =
2871 getDWLabel("debug_frame_begin", DebugFrameInfo.Number);
2872 MCSymbol *DebugFrameEnd =
2873 getDWLabel("debug_frame_end", DebugFrameInfo.Number);
2874 EmitDifference(DebugFrameEnd, DebugFrameBegin, true);
2876 Asm->OutStreamer.EmitLabel(DebugFrameBegin);
2878 Asm->OutStreamer.AddComment("FDE CIE offset");
2879 EmitSectionOffset(getTempLabel("debug_frame_common"),
2880 getTempLabel("section_debug_frame"), true);
2882 Asm->OutStreamer.AddComment("FDE initial location");
2883 MCSymbol *FuncBeginSym = getDWLabel("func_begin", DebugFrameInfo.Number);
2884 Asm->OutStreamer.EmitSymbolValue(FuncBeginSym,
2885 TD->getPointerSize(), 0/*AddrSpace*/);
2888 Asm->OutStreamer.AddComment("FDE address range");
2889 EmitDifference(getDWLabel("func_end", DebugFrameInfo.Number), FuncBeginSym);
2891 EmitFrameMoves(FuncBeginSym, DebugFrameInfo.Moves, false);
2893 Asm->EmitAlignment(2, 0, 0, false);
2894 Asm->OutStreamer.EmitLabel(DebugFrameEnd);
2897 /// emitDebugPubNames - Emit visible names into a debug pubnames section.
2899 void DwarfDebug::emitDebugPubNames() {
2900 // Start the dwarf pubnames section.
2901 Asm->OutStreamer.SwitchSection(
2902 Asm->getObjFileLowering().getDwarfPubNamesSection());
2904 Asm->OutStreamer.AddComment("Length of Public Names Info");
2905 EmitDifference(getDWLabel("pubnames_end", ModuleCU->getID()),
2906 getDWLabel("pubnames_begin", ModuleCU->getID()), true);
2908 Asm->OutStreamer.EmitLabel(getDWLabel("pubnames_begin", ModuleCU->getID()));
2910 Asm->OutStreamer.AddComment("DWARF Version");
2911 Asm->EmitInt16(dwarf::DWARF_VERSION);
2913 Asm->OutStreamer.AddComment("Offset of Compilation Unit Info");
2914 EmitSectionOffset(getDWLabel("info_begin", ModuleCU->getID()),
2915 getTempLabel("section_info"), true);
2917 Asm->OutStreamer.AddComment("Compilation Unit Length");
2918 EmitDifference(getDWLabel("info_end", ModuleCU->getID()),
2919 getDWLabel("info_begin", ModuleCU->getID()),
2922 const StringMap<DIE*> &Globals = ModuleCU->getGlobals();
2923 for (StringMap<DIE*>::const_iterator
2924 GI = Globals.begin(), GE = Globals.end(); GI != GE; ++GI) {
2925 const char *Name = GI->getKeyData();
2926 DIE *Entity = GI->second;
2928 Asm->OutStreamer.AddComment("DIE offset");
2929 Asm->EmitInt32(Entity->getOffset());
2931 if (Asm->VerboseAsm)
2932 Asm->OutStreamer.AddComment("External Name");
2933 Asm->OutStreamer.EmitBytes(StringRef(Name, strlen(Name)+1), 0);
2936 Asm->OutStreamer.AddComment("End Mark");
2938 Asm->OutStreamer.EmitLabel(getDWLabel("pubnames_end", ModuleCU->getID()));
2941 void DwarfDebug::emitDebugPubTypes() {
2942 // Start the dwarf pubnames section.
2943 Asm->OutStreamer.SwitchSection(
2944 Asm->getObjFileLowering().getDwarfPubTypesSection());
2945 Asm->OutStreamer.AddComment("Length of Public Types Info");
2946 EmitDifference(getDWLabel("pubtypes_end", ModuleCU->getID()),
2947 getDWLabel("pubtypes_begin", ModuleCU->getID()), true);
2949 Asm->OutStreamer.EmitLabel(getDWLabel("pubtypes_begin", ModuleCU->getID()));
2951 if (Asm->VerboseAsm) Asm->OutStreamer.AddComment("DWARF Version");
2952 Asm->EmitInt16(dwarf::DWARF_VERSION);
2954 Asm->OutStreamer.AddComment("Offset of Compilation ModuleCU Info");
2955 EmitSectionOffset(getDWLabel("info_begin", ModuleCU->getID()),
2956 getTempLabel("section_info"), true);
2958 Asm->OutStreamer.AddComment("Compilation ModuleCU Length");
2959 EmitDifference(getDWLabel("info_end", ModuleCU->getID()),
2960 getDWLabel("info_begin", ModuleCU->getID()),
2963 const StringMap<DIE*> &Globals = ModuleCU->getGlobalTypes();
2964 for (StringMap<DIE*>::const_iterator
2965 GI = Globals.begin(), GE = Globals.end(); GI != GE; ++GI) {
2966 const char *Name = GI->getKeyData();
2967 DIE * Entity = GI->second;
2969 if (Asm->VerboseAsm) Asm->OutStreamer.AddComment("DIE offset");
2970 Asm->EmitInt32(Entity->getOffset());
2972 if (Asm->VerboseAsm) Asm->OutStreamer.AddComment("External Name");
2973 Asm->OutStreamer.EmitBytes(StringRef(Name, GI->getKeyLength()+1), 0);
2976 Asm->OutStreamer.AddComment("End Mark");
2978 Asm->OutStreamer.EmitLabel(getDWLabel("pubtypes_end", ModuleCU->getID()));
2981 /// emitDebugStr - Emit visible names into a debug str section.
2983 void DwarfDebug::emitDebugStr() {
2984 // Check to see if it is worth the effort.
2985 if (StringPool.empty()) return;
2987 // Start the dwarf str section.
2988 Asm->OutStreamer.SwitchSection(
2989 Asm->getObjFileLowering().getDwarfStrSection());
2991 // Get all of the string pool entries and put them in an array by their ID so
2992 // we can sort them.
2993 SmallVector<std::pair<unsigned,
2994 StringMapEntry<std::pair<MCSymbol*, unsigned> >*>, 64> Entries;
2996 for (StringMap<std::pair<MCSymbol*, unsigned> >::iterator
2997 I = StringPool.begin(), E = StringPool.end(); I != E; ++I)
2998 Entries.push_back(std::make_pair(I->second.second, &*I));
3000 array_pod_sort(Entries.begin(), Entries.end());
3002 for (unsigned i = 0, e = Entries.size(); i != e; ++i) {
3003 // Emit a label for reference from debug information entries.
3004 Asm->OutStreamer.EmitLabel(Entries[i].second->getValue().first);
3006 // Emit the string itself.
3007 Asm->OutStreamer.EmitBytes(Entries[i].second->getKey(), 0/*addrspace*/);
3011 /// emitDebugLoc - Emit visible names into a debug loc section.
3013 void DwarfDebug::emitDebugLoc() {
3014 // Start the dwarf loc section.
3015 Asm->OutStreamer.SwitchSection(
3016 Asm->getObjFileLowering().getDwarfLocSection());
3019 /// EmitDebugARanges - Emit visible names into a debug aranges section.
3021 void DwarfDebug::EmitDebugARanges() {
3022 // Start the dwarf aranges section.
3023 Asm->OutStreamer.SwitchSection(
3024 Asm->getObjFileLowering().getDwarfARangesSection());
3027 /// emitDebugRanges - Emit visible names into a debug ranges section.
3029 void DwarfDebug::emitDebugRanges() {
3030 // Start the dwarf ranges section.
3031 Asm->OutStreamer.SwitchSection(
3032 Asm->getObjFileLowering().getDwarfRangesSection());
3035 /// emitDebugMacInfo - Emit visible names into a debug macinfo section.
3037 void DwarfDebug::emitDebugMacInfo() {
3038 if (const MCSection *LineInfo =
3039 Asm->getObjFileLowering().getDwarfMacroInfoSection()) {
3040 // Start the dwarf macinfo section.
3041 Asm->OutStreamer.SwitchSection(LineInfo);
3045 /// emitDebugInlineInfo - Emit inline info using following format.
3047 /// 1. length of section
3048 /// 2. Dwarf version number
3049 /// 3. address size.
3051 /// Entries (one "entry" for each function that was inlined):
3053 /// 1. offset into __debug_str section for MIPS linkage name, if exists;
3054 /// otherwise offset into __debug_str for regular function name.
3055 /// 2. offset into __debug_str section for regular function name.
3056 /// 3. an unsigned LEB128 number indicating the number of distinct inlining
3057 /// instances for the function.
3059 /// The rest of the entry consists of a {die_offset, low_pc} pair for each
3060 /// inlined instance; the die_offset points to the inlined_subroutine die in the
3061 /// __debug_info section, and the low_pc is the starting address for the
3062 /// inlining instance.
3063 void DwarfDebug::emitDebugInlineInfo() {
3064 if (!MAI->doesDwarfUsesInlineInfoSection())
3070 Asm->OutStreamer.SwitchSection(
3071 Asm->getObjFileLowering().getDwarfDebugInlineSection());
3073 Asm->OutStreamer.AddComment("Length of Debug Inlined Information Entry");
3074 EmitDifference(getDWLabel("debug_inlined_end", 1),
3075 getDWLabel("debug_inlined_begin", 1), true);
3077 Asm->OutStreamer.EmitLabel(getDWLabel("debug_inlined_begin", 1));
3079 Asm->OutStreamer.AddComment("Dwarf Version");
3080 Asm->EmitInt16(dwarf::DWARF_VERSION);
3081 Asm->OutStreamer.AddComment("Address Size (in bytes)");
3082 Asm->EmitInt8(TD->getPointerSize());
3084 for (SmallVector<MDNode *, 4>::iterator I = InlinedSPNodes.begin(),
3085 E = InlinedSPNodes.end(); I != E; ++I) {
3088 DenseMap<MDNode *, SmallVector<InlineInfoLabels, 4> >::iterator II
3089 = InlineInfo.find(Node);
3090 SmallVector<InlineInfoLabels, 4> &Labels = II->second;
3091 DISubprogram SP(Node);
3092 StringRef LName = SP.getLinkageName();
3093 StringRef Name = SP.getName();
3095 Asm->OutStreamer.AddComment("MIPS linkage name");
3096 if (LName.empty()) {
3097 Asm->OutStreamer.EmitBytes(Name, 0);
3098 Asm->OutStreamer.EmitIntValue(0, 1, 0); // nul terminator.
3100 EmitSectionOffset(getStringPoolEntry(getRealLinkageName(LName)),
3101 getTempLabel("section_str"), true);
3103 Asm->OutStreamer.AddComment("Function name");
3104 EmitSectionOffset(getStringPoolEntry(Name), getTempLabel("section_str"),
3106 EmitULEB128(Labels.size(), "Inline count");
3108 for (SmallVector<InlineInfoLabels, 4>::iterator LI = Labels.begin(),
3109 LE = Labels.end(); LI != LE; ++LI) {
3110 if (Asm->VerboseAsm) Asm->OutStreamer.AddComment("DIE offset");
3111 Asm->EmitInt32(LI->second->getOffset());
3113 if (Asm->VerboseAsm) Asm->OutStreamer.AddComment("low_pc");
3114 Asm->OutStreamer.EmitSymbolValue(LI->first, TD->getPointerSize(), 0);
3118 Asm->OutStreamer.EmitLabel(getDWLabel("debug_inlined_end", 1));