1 //===-- llvm/CodeGen/DwarfCompileUnit.cpp - Dwarf Compile Unit ------------===//
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 constructing a dwarf compile unit.
12 //===----------------------------------------------------------------------===//
14 #define DEBUG_TYPE "dwarfdebug"
16 #include "DwarfCompileUnit.h"
17 #include "DwarfAccelTable.h"
18 #include "DwarfDebug.h"
19 #include "llvm/ADT/APFloat.h"
20 #include "llvm/DIBuilder.h"
21 #include "llvm/IR/Constants.h"
22 #include "llvm/IR/DataLayout.h"
23 #include "llvm/IR/GlobalVariable.h"
24 #include "llvm/IR/Instructions.h"
25 #include "llvm/Target/Mangler.h"
26 #include "llvm/Target/TargetFrameLowering.h"
27 #include "llvm/Target/TargetMachine.h"
28 #include "llvm/Target/TargetLoweringObjectFile.h"
29 #include "llvm/Target/TargetRegisterInfo.h"
33 /// CompileUnit - Compile unit constructor.
34 CompileUnit::CompileUnit(unsigned UID, DIE *D, const MDNode *N, AsmPrinter *A,
35 DwarfDebug *DW, DwarfUnits *DWU)
36 : UniqueID(UID), Node(N), CUDie(D), Asm(A), DD(DW), DU(DWU), IndexTyDie(0) {
37 DIEIntegerOne = new (DIEValueAllocator) DIEInteger(1);
41 /// ~CompileUnit - Destructor for compile unit.
42 CompileUnit::~CompileUnit() {
43 for (unsigned j = 0, M = DIEBlocks.size(); j < M; ++j)
44 DIEBlocks[j]->~DIEBlock();
47 /// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug
48 /// information entry.
49 DIEEntry *CompileUnit::createDIEEntry(DIE *Entry) {
50 DIEEntry *Value = new (DIEValueAllocator) DIEEntry(Entry);
54 /// getDefaultLowerBound - Return the default lower bound for an array. If the
55 /// DWARF version doesn't handle the language, return -1.
56 int64_t CompileUnit::getDefaultLowerBound() const {
57 switch (DICompileUnit(Node).getLanguage()) {
61 case dwarf::DW_LANG_C89:
62 case dwarf::DW_LANG_C99:
63 case dwarf::DW_LANG_C:
64 case dwarf::DW_LANG_C_plus_plus:
65 case dwarf::DW_LANG_ObjC:
66 case dwarf::DW_LANG_ObjC_plus_plus:
69 case dwarf::DW_LANG_Fortran77:
70 case dwarf::DW_LANG_Fortran90:
71 case dwarf::DW_LANG_Fortran95:
74 // The languages below have valid values only if the DWARF version >= 4.
75 case dwarf::DW_LANG_Java:
76 case dwarf::DW_LANG_Python:
77 case dwarf::DW_LANG_UPC:
78 case dwarf::DW_LANG_D:
79 if (dwarf::DWARF_VERSION >= 4)
83 case dwarf::DW_LANG_Ada83:
84 case dwarf::DW_LANG_Ada95:
85 case dwarf::DW_LANG_Cobol74:
86 case dwarf::DW_LANG_Cobol85:
87 case dwarf::DW_LANG_Modula2:
88 case dwarf::DW_LANG_Pascal83:
89 case dwarf::DW_LANG_PLI:
90 if (dwarf::DWARF_VERSION >= 4)
98 /// addFlag - Add a flag that is true.
99 void CompileUnit::addFlag(DIE *Die, uint16_t Attribute) {
100 if (DD->getDwarfVersion() >= 4)
101 Die->addValue(Attribute, dwarf::DW_FORM_flag_present, DIEIntegerOne);
103 Die->addValue(Attribute, dwarf::DW_FORM_flag, DIEIntegerOne);
106 /// addUInt - Add an unsigned integer attribute data and value.
108 void CompileUnit::addUInt(DIE *Die, uint16_t Attribute,
109 uint16_t Form, uint64_t Integer) {
110 if (!Form) Form = DIEInteger::BestForm(false, Integer);
111 DIEValue *Value = Integer == 1 ?
112 DIEIntegerOne : new (DIEValueAllocator) DIEInteger(Integer);
113 Die->addValue(Attribute, Form, Value);
116 /// addSInt - Add an signed integer attribute data and value.
118 void CompileUnit::addSInt(DIE *Die, uint16_t Attribute,
119 uint16_t Form, int64_t Integer) {
120 if (!Form) Form = DIEInteger::BestForm(true, Integer);
121 DIEValue *Value = new (DIEValueAllocator) DIEInteger(Integer);
122 Die->addValue(Attribute, Form, Value);
125 /// addString - Add a string attribute data and value. We always emit a
126 /// reference to the string pool instead of immediate strings so that DIEs have
127 /// more predictable sizes. In the case of split dwarf we emit an index
128 /// into another table which gets us the static offset into the string
130 void CompileUnit::addString(DIE *Die, uint16_t Attribute, StringRef String) {
133 if (!DD->useSplitDwarf()) {
134 MCSymbol *Symb = DU->getStringPoolEntry(String);
135 if (Asm->needsRelocationsForDwarfStringPool())
136 Value = new (DIEValueAllocator) DIELabel(Symb);
138 MCSymbol *StringPool = DU->getStringPoolSym();
139 Value = new (DIEValueAllocator) DIEDelta(Symb, StringPool);
141 Form = dwarf::DW_FORM_strp;
143 unsigned idx = DU->getStringPoolIndex(String);
144 Value = new (DIEValueAllocator) DIEInteger(idx);
145 Form = dwarf::DW_FORM_GNU_str_index;
147 DIEValue *Str = new (DIEValueAllocator) DIEString(Value, String);
148 Die->addValue(Attribute, Form, Str);
151 /// addLocalString - Add a string attribute data and value. This is guaranteed
152 /// to be in the local string pool instead of indirected.
153 void CompileUnit::addLocalString(DIE *Die, uint16_t Attribute,
155 MCSymbol *Symb = DU->getStringPoolEntry(String);
157 if (Asm->needsRelocationsForDwarfStringPool())
158 Value = new (DIEValueAllocator) DIELabel(Symb);
160 MCSymbol *StringPool = DU->getStringPoolSym();
161 Value = new (DIEValueAllocator) DIEDelta(Symb, StringPool);
163 Die->addValue(Attribute, dwarf::DW_FORM_strp, Value);
166 /// addExpr - Add a Dwarf expression attribute data and value.
168 void CompileUnit::addExpr(DIE *Die, uint16_t Attribute, uint16_t Form,
169 const MCExpr *Expr) {
170 DIEValue *Value = new (DIEValueAllocator) DIEExpr(Expr);
171 Die->addValue(Attribute, Form, Value);
174 /// addLabel - Add a Dwarf label attribute data and value.
176 void CompileUnit::addLabel(DIE *Die, uint16_t Attribute, uint16_t Form,
177 const MCSymbol *Label) {
178 DIEValue *Value = new (DIEValueAllocator) DIELabel(Label);
179 Die->addValue(Attribute, Form, Value);
182 /// addLabelAddress - Add a dwarf label attribute data and value using
183 /// DW_FORM_addr or DW_FORM_GNU_addr_index.
185 void CompileUnit::addLabelAddress(DIE *Die, uint16_t Attribute,
188 DD->addArangeLabel(SymbolCU(this, Label));
190 if (!DD->useSplitDwarf()) {
192 DIEValue *Value = new (DIEValueAllocator) DIELabel(Label);
193 Die->addValue(Attribute, dwarf::DW_FORM_addr, Value);
195 DIEValue *Value = new (DIEValueAllocator) DIEInteger(0);
196 Die->addValue(Attribute, dwarf::DW_FORM_addr, Value);
199 unsigned idx = DU->getAddrPoolIndex(Label);
200 DIEValue *Value = new (DIEValueAllocator) DIEInteger(idx);
201 Die->addValue(Attribute, dwarf::DW_FORM_GNU_addr_index, Value);
205 /// addOpAddress - Add a dwarf op address data and value using the
206 /// form given and an op of either DW_FORM_addr or DW_FORM_GNU_addr_index.
208 void CompileUnit::addOpAddress(DIE *Die, const MCSymbol *Sym) {
209 DD->addArangeLabel(SymbolCU(this, Sym));
210 if (!DD->useSplitDwarf()) {
211 addUInt(Die, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr);
212 addLabel(Die, 0, dwarf::DW_FORM_udata, Sym);
214 addUInt(Die, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_GNU_addr_index);
215 addUInt(Die, 0, dwarf::DW_FORM_GNU_addr_index, DU->getAddrPoolIndex(Sym));
219 /// addDelta - Add a label delta attribute data and value.
221 void CompileUnit::addDelta(DIE *Die, uint16_t Attribute, uint16_t Form,
222 const MCSymbol *Hi, const MCSymbol *Lo) {
223 DIEValue *Value = new (DIEValueAllocator) DIEDelta(Hi, Lo);
224 Die->addValue(Attribute, Form, Value);
227 /// addDIEEntry - Add a DIE attribute data and value.
229 void CompileUnit::addDIEEntry(DIE *Die, uint16_t Attribute, DIE *Entry) {
230 // We currently only use ref4.
231 Die->addValue(Attribute, dwarf::DW_FORM_ref4, createDIEEntry(Entry));
234 /// addBlock - Add block data.
236 void CompileUnit::addBlock(DIE *Die, uint16_t Attribute, uint16_t Form,
238 Block->ComputeSize(Asm);
239 DIEBlocks.push_back(Block); // Memoize so we can call the destructor later on.
240 Die->addValue(Attribute, Block->BestForm(), Block);
243 /// addSourceLine - Add location information to specified debug information
245 void CompileUnit::addSourceLine(DIE *Die, DIVariable V) {
250 unsigned Line = V.getLineNumber();
253 unsigned FileID = DD->getOrCreateSourceID(V.getContext().getFilename(),
254 V.getContext().getDirectory(),
256 assert(FileID && "Invalid file id");
257 addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
258 addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
261 /// addSourceLine - Add location information to specified debug information
263 void CompileUnit::addSourceLine(DIE *Die, DIGlobalVariable G) {
264 // Verify global variable.
265 if (!G.isGlobalVariable())
268 unsigned Line = G.getLineNumber();
271 unsigned FileID = DD->getOrCreateSourceID(G.getFilename(), G.getDirectory(),
273 assert(FileID && "Invalid file id");
274 addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
275 addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
278 /// addSourceLine - Add location information to specified debug information
280 void CompileUnit::addSourceLine(DIE *Die, DISubprogram SP) {
281 // Verify subprogram.
282 if (!SP.isSubprogram())
285 // If the line number is 0, don't add it.
286 unsigned Line = SP.getLineNumber();
290 unsigned FileID = DD->getOrCreateSourceID(SP.getFilename(),
291 SP.getDirectory(), getUniqueID());
292 assert(FileID && "Invalid file id");
293 addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
294 addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
297 /// addSourceLine - Add location information to specified debug information
299 void CompileUnit::addSourceLine(DIE *Die, DIType Ty) {
304 unsigned Line = Ty.getLineNumber();
307 unsigned FileID = DD->getOrCreateSourceID(Ty.getFilename(),
308 Ty.getDirectory(), getUniqueID());
309 assert(FileID && "Invalid file id");
310 addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
311 addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
314 /// addSourceLine - Add location information to specified debug information
316 void CompileUnit::addSourceLine(DIE *Die, DIObjCProperty Ty) {
318 if (!Ty.isObjCProperty())
321 unsigned Line = Ty.getLineNumber();
324 DIFile File = Ty.getFile();
325 unsigned FileID = DD->getOrCreateSourceID(File.getFilename(),
326 File.getDirectory(), getUniqueID());
327 assert(FileID && "Invalid file id");
328 addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
329 addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
332 /// addSourceLine - Add location information to specified debug information
334 void CompileUnit::addSourceLine(DIE *Die, DINameSpace NS) {
339 unsigned Line = NS.getLineNumber();
342 StringRef FN = NS.getFilename();
344 unsigned FileID = DD->getOrCreateSourceID(FN, NS.getDirectory(),
346 assert(FileID && "Invalid file id");
347 addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
348 addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
351 /// addVariableAddress - Add DW_AT_location attribute for a
352 /// DbgVariable based on provided MachineLocation.
353 void CompileUnit::addVariableAddress(const DbgVariable &DV, DIE *Die,
354 MachineLocation Location) {
355 if (DV.variableHasComplexAddress())
356 addComplexAddress(DV, Die, dwarf::DW_AT_location, Location);
357 else if (DV.isBlockByrefVariable())
358 addBlockByrefAddress(DV, Die, dwarf::DW_AT_location, Location);
360 addAddress(Die, dwarf::DW_AT_location, Location,
361 DV.getVariable().isIndirect());
364 /// addRegisterOp - Add register operand.
365 void CompileUnit::addRegisterOp(DIE *TheDie, unsigned Reg) {
366 const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
367 unsigned DWReg = RI->getDwarfRegNum(Reg, false);
369 addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + DWReg);
371 addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_regx);
372 addUInt(TheDie, 0, dwarf::DW_FORM_udata, DWReg);
376 /// addRegisterOffset - Add register offset.
377 void CompileUnit::addRegisterOffset(DIE *TheDie, unsigned Reg,
379 const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
380 unsigned DWReg = RI->getDwarfRegNum(Reg, false);
381 const TargetRegisterInfo *TRI = Asm->TM.getRegisterInfo();
382 if (Reg == TRI->getFrameRegister(*Asm->MF))
383 // If variable offset is based in frame register then use fbreg.
384 addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_fbreg);
386 addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + DWReg);
388 addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx);
389 addUInt(TheDie, 0, dwarf::DW_FORM_udata, DWReg);
391 addSInt(TheDie, 0, dwarf::DW_FORM_sdata, Offset);
394 /// addAddress - Add an address attribute to a die based on the location
396 void CompileUnit::addAddress(DIE *Die, uint16_t Attribute,
397 const MachineLocation &Location, bool Indirect) {
398 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
400 if (Location.isReg() && !Indirect)
401 addRegisterOp(Block, Location.getReg());
403 addRegisterOffset(Block, Location.getReg(), Location.getOffset());
404 if (Indirect && !Location.isReg()) {
405 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
409 // Now attach the location information to the DIE.
410 addBlock(Die, Attribute, 0, Block);
413 /// addComplexAddress - Start with the address based on the location provided,
414 /// and generate the DWARF information necessary to find the actual variable
415 /// given the extra address information encoded in the DIVariable, starting from
416 /// the starting location. Add the DWARF information to the die.
418 void CompileUnit::addComplexAddress(const DbgVariable &DV, DIE *Die,
420 const MachineLocation &Location) {
421 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
422 unsigned N = DV.getNumAddrElements();
424 if (Location.isReg()) {
425 if (N >= 2 && DV.getAddrElement(0) == DIBuilder::OpPlus) {
426 // If first address element is OpPlus then emit
427 // DW_OP_breg + Offset instead of DW_OP_reg + Offset.
428 addRegisterOffset(Block, Location.getReg(), DV.getAddrElement(1));
431 addRegisterOp(Block, Location.getReg());
434 addRegisterOffset(Block, Location.getReg(), Location.getOffset());
437 uint64_t Element = DV.getAddrElement(i);
438 if (Element == DIBuilder::OpPlus) {
439 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
440 addUInt(Block, 0, dwarf::DW_FORM_udata, DV.getAddrElement(++i));
441 } else if (Element == DIBuilder::OpDeref) {
442 if (!Location.isReg())
443 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
444 } else llvm_unreachable("unknown DIBuilder Opcode");
447 // Now attach the location information to the DIE.
448 addBlock(Die, Attribute, 0, Block);
451 /* Byref variables, in Blocks, are declared by the programmer as "SomeType
452 VarName;", but the compiler creates a __Block_byref_x_VarName struct, and
453 gives the variable VarName either the struct, or a pointer to the struct, as
454 its type. This is necessary for various behind-the-scenes things the
455 compiler needs to do with by-reference variables in Blocks.
457 However, as far as the original *programmer* is concerned, the variable
458 should still have type 'SomeType', as originally declared.
460 The function getBlockByrefType dives into the __Block_byref_x_VarName
461 struct to find the original type of the variable, which is then assigned to
462 the variable's Debug Information Entry as its real type. So far, so good.
463 However now the debugger will expect the variable VarName to have the type
464 SomeType. So we need the location attribute for the variable to be an
465 expression that explains to the debugger how to navigate through the
466 pointers and struct to find the actual variable of type SomeType.
468 The following function does just that. We start by getting
469 the "normal" location for the variable. This will be the location
470 of either the struct __Block_byref_x_VarName or the pointer to the
471 struct __Block_byref_x_VarName.
473 The struct will look something like:
475 struct __Block_byref_x_VarName {
477 struct __Block_byref_x_VarName *forwarding;
478 ... <various other fields>
480 ... <maybe more fields>
483 If we are given the struct directly (as our starting point) we
484 need to tell the debugger to:
486 1). Add the offset of the forwarding field.
488 2). Follow that pointer to get the real __Block_byref_x_VarName
489 struct to use (the real one may have been copied onto the heap).
491 3). Add the offset for the field VarName, to find the actual variable.
493 If we started with a pointer to the struct, then we need to
494 dereference that pointer first, before the other steps.
495 Translating this into DWARF ops, we will need to append the following
496 to the current location description for the variable:
498 DW_OP_deref -- optional, if we start with a pointer
499 DW_OP_plus_uconst <forward_fld_offset>
501 DW_OP_plus_uconst <varName_fld_offset>
503 That is what this function does. */
505 /// addBlockByrefAddress - Start with the address based on the location
506 /// provided, and generate the DWARF information necessary to find the
507 /// actual Block variable (navigating the Block struct) based on the
508 /// starting location. Add the DWARF information to the die. For
509 /// more information, read large comment just above here.
511 void CompileUnit::addBlockByrefAddress(const DbgVariable &DV, DIE *Die,
513 const MachineLocation &Location) {
514 DIType Ty = DV.getType();
516 uint16_t Tag = Ty.getTag();
517 bool isPointer = false;
519 StringRef varName = DV.getName();
521 if (Tag == dwarf::DW_TAG_pointer_type) {
522 DIDerivedType DTy = DIDerivedType(Ty);
523 TmpTy = resolve(DTy.getTypeDerivedFrom());
527 DICompositeType blockStruct = DICompositeType(TmpTy);
529 // Find the __forwarding field and the variable field in the __Block_byref
531 DIArray Fields = blockStruct.getTypeArray();
532 DIDescriptor varField = DIDescriptor();
533 DIDescriptor forwardingField = DIDescriptor();
535 for (unsigned i = 0, N = Fields.getNumElements(); i < N; ++i) {
536 DIDescriptor Element = Fields.getElement(i);
537 DIDerivedType DT = DIDerivedType(Element);
538 StringRef fieldName = DT.getName();
539 if (fieldName == "__forwarding")
540 forwardingField = Element;
541 else if (fieldName == varName)
545 // Get the offsets for the forwarding field and the variable field.
546 unsigned forwardingFieldOffset =
547 DIDerivedType(forwardingField).getOffsetInBits() >> 3;
548 unsigned varFieldOffset =
549 DIDerivedType(varField).getOffsetInBits() >> 3;
551 // Decode the original location, and use that as the start of the byref
552 // variable's location.
553 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
555 if (Location.isReg())
556 addRegisterOp(Block, Location.getReg());
558 addRegisterOffset(Block, Location.getReg(), Location.getOffset());
560 // If we started with a pointer to the __Block_byref... struct, then
561 // the first thing we need to do is dereference the pointer (DW_OP_deref).
563 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
565 // Next add the offset for the '__forwarding' field:
566 // DW_OP_plus_uconst ForwardingFieldOffset. Note there's no point in
567 // adding the offset if it's 0.
568 if (forwardingFieldOffset > 0) {
569 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
570 addUInt(Block, 0, dwarf::DW_FORM_udata, forwardingFieldOffset);
573 // Now dereference the __forwarding field to get to the real __Block_byref
574 // struct: DW_OP_deref.
575 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
577 // Now that we've got the real __Block_byref... struct, add the offset
578 // for the variable's field to get to the location of the actual variable:
579 // DW_OP_plus_uconst varFieldOffset. Again, don't add if it's 0.
580 if (varFieldOffset > 0) {
581 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
582 addUInt(Block, 0, dwarf::DW_FORM_udata, varFieldOffset);
585 // Now attach the location information to the DIE.
586 addBlock(Die, Attribute, 0, Block);
589 /// isTypeSigned - Return true if the type is signed.
590 static bool isTypeSigned(DwarfDebug *DD, DIType Ty, int *SizeInBits) {
591 if (Ty.isDerivedType())
592 return isTypeSigned(DD, DD->resolve(DIDerivedType(Ty).getTypeDerivedFrom()),
594 if (Ty.isBasicType())
595 if (DIBasicType(Ty).getEncoding() == dwarf::DW_ATE_signed
596 || DIBasicType(Ty).getEncoding() == dwarf::DW_ATE_signed_char) {
597 *SizeInBits = Ty.getSizeInBits();
603 /// Return true if type encoding is unsigned.
604 static bool isUnsignedDIType(DwarfDebug *DD, DIType Ty) {
605 DIDerivedType DTy(Ty);
606 if (DTy.isDerivedType())
607 return isUnsignedDIType(DD, DD->resolve(DTy.getTypeDerivedFrom()));
610 if (BTy.isBasicType()) {
611 unsigned Encoding = BTy.getEncoding();
612 if (Encoding == dwarf::DW_ATE_unsigned ||
613 Encoding == dwarf::DW_ATE_unsigned_char ||
614 Encoding == dwarf::DW_ATE_boolean)
620 /// If this type is derived from a base type then return base type size.
621 static uint64_t getBaseTypeSize(DwarfDebug *DD, DIDerivedType Ty) {
622 unsigned Tag = Ty.getTag();
624 if (Tag != dwarf::DW_TAG_member && Tag != dwarf::DW_TAG_typedef &&
625 Tag != dwarf::DW_TAG_const_type && Tag != dwarf::DW_TAG_volatile_type &&
626 Tag != dwarf::DW_TAG_restrict_type)
627 return Ty.getSizeInBits();
629 DIType BaseType = DD->resolve(Ty.getTypeDerivedFrom());
631 // If this type is not derived from any type then take conservative approach.
632 if (!BaseType.isValid())
633 return Ty.getSizeInBits();
635 // If this is a derived type, go ahead and get the base type, unless it's a
636 // reference then it's just the size of the field. Pointer types have no need
637 // of this since they're a different type of qualification on the type.
638 if (BaseType.getTag() == dwarf::DW_TAG_reference_type ||
639 BaseType.getTag() == dwarf::DW_TAG_rvalue_reference_type)
640 return Ty.getSizeInBits();
642 if (BaseType.isDerivedType())
643 return getBaseTypeSize(DD, DIDerivedType(BaseType));
645 return BaseType.getSizeInBits();
648 /// addConstantValue - Add constant value entry in variable DIE.
649 void CompileUnit::addConstantValue(DIE *Die, const MachineOperand &MO,
651 // FIXME: This is a bit conservative/simple - it emits negative values at
652 // their maximum bit width which is a bit unfortunate (& doesn't prefer
653 // udata/sdata over dataN as suggested by the DWARF spec)
654 assert(MO.isImm() && "Invalid machine operand!");
656 bool SignedConstant = isTypeSigned(DD, Ty, &SizeInBits);
659 // If we're a signed constant definitely use sdata.
660 if (SignedConstant) {
661 addSInt(Die, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, MO.getImm());
665 // Else use data for now unless it's larger than we can deal with.
666 switch (SizeInBits) {
668 Form = dwarf::DW_FORM_data1;
671 Form = dwarf::DW_FORM_data2;
674 Form = dwarf::DW_FORM_data4;
677 Form = dwarf::DW_FORM_data8;
680 Form = dwarf::DW_FORM_udata;
681 addUInt(Die, dwarf::DW_AT_const_value, Form, MO.getImm());
684 addUInt(Die, dwarf::DW_AT_const_value, Form, MO.getImm());
687 /// addConstantFPValue - Add constant value entry in variable DIE.
688 void CompileUnit::addConstantFPValue(DIE *Die, const MachineOperand &MO) {
689 assert (MO.isFPImm() && "Invalid machine operand!");
690 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
691 APFloat FPImm = MO.getFPImm()->getValueAPF();
693 // Get the raw data form of the floating point.
694 const APInt FltVal = FPImm.bitcastToAPInt();
695 const char *FltPtr = (const char*)FltVal.getRawData();
697 int NumBytes = FltVal.getBitWidth() / 8; // 8 bits per byte.
698 bool LittleEndian = Asm->getDataLayout().isLittleEndian();
699 int Incr = (LittleEndian ? 1 : -1);
700 int Start = (LittleEndian ? 0 : NumBytes - 1);
701 int Stop = (LittleEndian ? NumBytes : -1);
703 // Output the constant to DWARF one byte at a time.
704 for (; Start != Stop; Start += Incr)
705 addUInt(Block, 0, dwarf::DW_FORM_data1,
706 (unsigned char)0xFF & FltPtr[Start]);
708 addBlock(Die, dwarf::DW_AT_const_value, 0, Block);
711 /// addConstantFPValue - Add constant value entry in variable DIE.
712 void CompileUnit::addConstantFPValue(DIE *Die, const ConstantFP *CFP) {
713 // Pass this down to addConstantValue as an unsigned bag of bits.
714 addConstantValue(Die, CFP->getValueAPF().bitcastToAPInt(), true);
717 /// addConstantValue - Add constant value entry in variable DIE.
718 void CompileUnit::addConstantValue(DIE *Die, const ConstantInt *CI,
720 addConstantValue(Die, CI->getValue(), Unsigned);
723 // addConstantValue - Add constant value entry in variable DIE.
724 void CompileUnit::addConstantValue(DIE *Die, const APInt &Val, bool Unsigned) {
725 unsigned CIBitWidth = Val.getBitWidth();
726 if (CIBitWidth <= 64) {
727 // If we're a signed constant definitely use sdata.
729 addSInt(Die, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata,
734 // Else use data for now unless it's larger than we can deal with.
736 switch (CIBitWidth) {
738 Form = dwarf::DW_FORM_data1;
741 Form = dwarf::DW_FORM_data2;
744 Form = dwarf::DW_FORM_data4;
747 Form = dwarf::DW_FORM_data8;
750 addUInt(Die, dwarf::DW_AT_const_value, dwarf::DW_FORM_udata,
754 addUInt(Die, dwarf::DW_AT_const_value, Form, Val.getZExtValue());
758 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
760 // Get the raw data form of the large APInt.
761 const uint64_t *Ptr64 = Val.getRawData();
763 int NumBytes = Val.getBitWidth() / 8; // 8 bits per byte.
764 bool LittleEndian = Asm->getDataLayout().isLittleEndian();
766 // Output the constant to DWARF one byte at a time.
767 for (int i = 0; i < NumBytes; i++) {
770 c = Ptr64[i / 8] >> (8 * (i & 7));
772 c = Ptr64[(NumBytes - 1 - i) / 8] >> (8 * ((NumBytes - 1 - i) & 7));
773 addUInt(Block, 0, dwarf::DW_FORM_data1, c);
776 addBlock(Die, dwarf::DW_AT_const_value, 0, Block);
779 /// addTemplateParams - Add template parameters into buffer.
780 void CompileUnit::addTemplateParams(DIE &Buffer, DIArray TParams) {
781 // Add template parameters.
782 for (unsigned i = 0, e = TParams.getNumElements(); i != e; ++i) {
783 DIDescriptor Element = TParams.getElement(i);
784 if (Element.isTemplateTypeParameter())
785 Buffer.addChild(getOrCreateTemplateTypeParameterDIE(
786 DITemplateTypeParameter(Element)));
787 else if (Element.isTemplateValueParameter())
788 Buffer.addChild(getOrCreateTemplateValueParameterDIE(
789 DITemplateValueParameter(Element)));
793 /// getOrCreateContextDIE - Get context owner's DIE.
794 DIE *CompileUnit::getOrCreateContextDIE(DIScope Context) {
795 if (Context.isType())
796 return getOrCreateTypeDIE(DIType(Context));
797 else if (Context.isNameSpace())
798 return getOrCreateNameSpace(DINameSpace(Context));
799 else if (Context.isSubprogram())
800 return getOrCreateSubprogramDIE(DISubprogram(Context));
802 return getDIE(Context);
805 /// addToContextOwner - Add Die into the list of its context owner's children.
806 void CompileUnit::addToContextOwner(DIE *Die, DIScope Context) {
807 assert(!Die->getParent());
808 if (DIE *ContextDIE = getOrCreateContextDIE(Context)) {
809 if (Die->getParent()) {
810 // While creating the context, if this is a type member, we will have
811 // added the child to the context already.
812 assert(Die->getParent() == ContextDIE);
815 ContextDIE->addChild(Die);
820 /// getOrCreateTypeDIE - Find existing DIE or create new DIE for the
822 DIE *CompileUnit::getOrCreateTypeDIE(const MDNode *TyNode) {
826 DIE *TyDIE = getDIE(Ty);
831 TyDIE = new DIE(Ty.getTag());
832 insertDIE(Ty, TyDIE);
833 if (Ty.isBasicType())
834 constructTypeDIE(*TyDIE, DIBasicType(Ty));
835 else if (Ty.isCompositeType())
836 constructTypeDIE(*TyDIE, DICompositeType(Ty));
838 assert(Ty.isDerivedType() && "Unknown kind of DIType");
839 constructTypeDIE(*TyDIE, DIDerivedType(Ty));
841 // If this is a named finished type then include it in the list of types
842 // for the accelerator tables.
843 if (!Ty.getName().empty() && !Ty.isForwardDecl()) {
844 bool IsImplementation = 0;
845 if (Ty.isCompositeType()) {
846 DICompositeType CT(Ty);
847 // A runtime language of 0 actually means C/C++ and that any
848 // non-negative value is some version of Objective-C/C++.
849 IsImplementation = (CT.getRunTimeLang() == 0) ||
850 CT.isObjcClassComplete();
852 unsigned Flags = IsImplementation ? dwarf::DW_FLAG_type_implementation : 0;
853 addAccelType(Ty.getName(), std::make_pair(TyDIE, Flags));
856 addToContextOwner(TyDIE, resolve(Ty.getContext()));
860 /// addType - Add a new type attribute to the specified entity.
861 void CompileUnit::addType(DIE *Entity, DIType Ty, uint16_t Attribute) {
862 assert(Ty && "Trying to add a type that doesn't exist?");
864 // Check for pre-existence.
865 DIEEntry *Entry = getDIEEntry(Ty);
866 // If it exists then use the existing value.
868 Entity->addValue(Attribute, dwarf::DW_FORM_ref4, Entry);
873 DIE *Buffer = getOrCreateTypeDIE(Ty);
876 Entry = createDIEEntry(Buffer);
877 insertDIEEntry(Ty, Entry);
878 Entity->addValue(Attribute, dwarf::DW_FORM_ref4, Entry);
880 // If this is a complete composite type then include it in the
881 // list of global types.
885 // Accelerator table mutators - add each name along with its companion
886 // DIE to the proper table while ensuring that the name that we're going
887 // to reference is in the string table. We do this since the names we
888 // add may not only be identical to the names in the DIE.
889 void CompileUnit::addAccelName(StringRef Name, DIE *Die) {
890 DU->getStringPoolEntry(Name);
891 std::vector<DIE *> &DIEs = AccelNames[Name];
895 void CompileUnit::addAccelObjC(StringRef Name, DIE *Die) {
896 DU->getStringPoolEntry(Name);
897 std::vector<DIE *> &DIEs = AccelObjC[Name];
901 void CompileUnit::addAccelNamespace(StringRef Name, DIE *Die) {
902 DU->getStringPoolEntry(Name);
903 std::vector<DIE *> &DIEs = AccelNamespace[Name];
907 void CompileUnit::addAccelType(StringRef Name, std::pair<DIE *, unsigned> Die) {
908 DU->getStringPoolEntry(Name);
909 std::vector<std::pair<DIE *, unsigned> > &DIEs = AccelTypes[Name];
913 /// addGlobalName - Add a new global name to the compile unit.
914 void CompileUnit::addGlobalName(StringRef Name, DIE *Die) {
915 GlobalNames[Name] = Die;
918 /// addGlobalType - Add a new global type to the compile unit.
920 void CompileUnit::addGlobalType(DIType Ty) {
921 DIScope Context = resolve(Ty.getContext());
922 if (!Ty.getName().empty() && !Ty.isForwardDecl() &&
923 (!Context || Context.isCompileUnit() || Context.isFile() ||
924 Context.isNameSpace()))
925 if (DIEEntry *Entry = getDIEEntry(Ty))
926 GlobalTypes[Ty.getName()] = Entry->getEntry();
929 /// addPubTypes - Add subprogram argument types for pubtypes section.
930 void CompileUnit::addPubTypes(DISubprogram SP) {
931 DICompositeType SPTy = SP.getType();
932 uint16_t SPTag = SPTy.getTag();
933 if (SPTag != dwarf::DW_TAG_subroutine_type)
936 DIArray Args = SPTy.getTypeArray();
937 for (unsigned i = 0, e = Args.getNumElements(); i != e; ++i) {
938 DIType ATy(Args.getElement(i));
945 /// constructTypeDIE - Construct basic type die from DIBasicType.
946 void CompileUnit::constructTypeDIE(DIE &Buffer, DIBasicType BTy) {
947 // Get core information.
948 StringRef Name = BTy.getName();
949 // Add name if not anonymous or intermediate type.
951 addString(&Buffer, dwarf::DW_AT_name, Name);
953 // An unspecified type only has a name attribute.
954 if (BTy.getTag() == dwarf::DW_TAG_unspecified_type)
957 addUInt(&Buffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
960 uint64_t Size = BTy.getSizeInBits() >> 3;
961 addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
964 /// constructTypeDIE - Construct derived type die from DIDerivedType.
965 void CompileUnit::constructTypeDIE(DIE &Buffer, DIDerivedType DTy) {
966 // Get core information.
967 StringRef Name = DTy.getName();
968 uint64_t Size = DTy.getSizeInBits() >> 3;
969 uint16_t Tag = Buffer.getTag();
971 // Map to main type, void will not have a type.
972 DIType FromTy = resolve(DTy.getTypeDerivedFrom());
974 addType(&Buffer, FromTy);
976 // Add name if not anonymous or intermediate type.
978 addString(&Buffer, dwarf::DW_AT_name, Name);
980 // Add size if non-zero (derived types might be zero-sized.)
981 if (Size && Tag != dwarf::DW_TAG_pointer_type)
982 addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
984 if (Tag == dwarf::DW_TAG_ptr_to_member_type)
985 addDIEEntry(&Buffer, dwarf::DW_AT_containing_type,
986 getOrCreateTypeDIE(resolve(DTy.getClassType())));
987 // Add source line info if available and TyDesc is not a forward declaration.
988 if (!DTy.isForwardDecl())
989 addSourceLine(&Buffer, DTy);
992 /// Return true if the type is appropriately scoped to be contained inside
993 /// its own type unit.
994 static bool isTypeUnitScoped(DIType Ty, const DwarfDebug *DD) {
995 DIScope Parent = DD->resolve(Ty.getContext());
997 // Don't generate a hash for anything scoped inside a function.
998 if (Parent.isSubprogram())
1000 Parent = DD->resolve(Parent.getContext());
1005 /// Return true if the type should be split out into a type unit.
1006 static bool shouldCreateTypeUnit(DICompositeType CTy, const DwarfDebug *DD) {
1007 uint16_t Tag = CTy.getTag();
1010 case dwarf::DW_TAG_structure_type:
1011 case dwarf::DW_TAG_union_type:
1012 case dwarf::DW_TAG_enumeration_type:
1013 case dwarf::DW_TAG_class_type:
1014 // If this is a class, structure, union, or enumeration type
1015 // that is a definition (not a declaration), and not scoped
1016 // inside a function then separate this out as a type unit.
1017 return !CTy.isForwardDecl() && isTypeUnitScoped(CTy, DD);
1023 /// constructTypeDIE - Construct type DIE from DICompositeType.
1024 void CompileUnit::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
1025 // Get core information.
1026 StringRef Name = CTy.getName();
1028 uint64_t Size = CTy.getSizeInBits() >> 3;
1029 uint16_t Tag = Buffer.getTag();
1032 case dwarf::DW_TAG_array_type:
1033 constructArrayTypeDIE(Buffer, &CTy);
1035 case dwarf::DW_TAG_enumeration_type: {
1036 DIArray Elements = CTy.getTypeArray();
1038 // Add enumerators to enumeration type.
1039 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
1040 DIE *ElemDie = NULL;
1041 DIDescriptor Enum(Elements.getElement(i));
1042 if (Enum.isEnumerator()) {
1043 ElemDie = constructEnumTypeDIE(DIEnumerator(Enum));
1044 Buffer.addChild(ElemDie);
1047 DIType DTy = resolve(CTy.getTypeDerivedFrom());
1049 addType(&Buffer, DTy);
1050 addFlag(&Buffer, dwarf::DW_AT_enum_class);
1054 case dwarf::DW_TAG_subroutine_type: {
1055 // Add return type. A void return won't have a type.
1056 DIArray Elements = CTy.getTypeArray();
1057 DIDescriptor RTy = Elements.getElement(0);
1059 addType(&Buffer, DIType(RTy));
1061 bool isPrototyped = true;
1063 for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) {
1064 DIDescriptor Ty = Elements.getElement(i);
1065 if (Ty.isUnspecifiedParameter()) {
1066 DIE *Arg = new DIE(dwarf::DW_TAG_unspecified_parameters);
1067 Buffer.addChild(Arg);
1068 isPrototyped = false;
1070 DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
1071 addType(Arg, DIType(Ty));
1072 if (DIType(Ty).isArtificial())
1073 addFlag(Arg, dwarf::DW_AT_artificial);
1074 Buffer.addChild(Arg);
1077 // Add prototype flag if we're dealing with a C language and the
1078 // function has been prototyped.
1079 uint16_t Language = DICompileUnit(Node).getLanguage();
1081 (Language == dwarf::DW_LANG_C89 ||
1082 Language == dwarf::DW_LANG_C99 ||
1083 Language == dwarf::DW_LANG_ObjC))
1084 addFlag(&Buffer, dwarf::DW_AT_prototyped);
1087 case dwarf::DW_TAG_structure_type:
1088 case dwarf::DW_TAG_union_type:
1089 case dwarf::DW_TAG_class_type: {
1090 // Add elements to structure type.
1091 DIArray Elements = CTy.getTypeArray();
1092 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
1093 DIDescriptor Element = Elements.getElement(i);
1094 DIE *ElemDie = NULL;
1095 if (Element.isSubprogram()) {
1096 DISubprogram SP(Element);
1097 ElemDie = getOrCreateSubprogramDIE(DISubprogram(Element));
1098 if (SP.isProtected())
1099 addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1100 dwarf::DW_ACCESS_protected);
1101 else if (SP.isPrivate())
1102 addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1103 dwarf::DW_ACCESS_private);
1105 addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1106 dwarf::DW_ACCESS_public);
1107 if (SP.isExplicit())
1108 addFlag(ElemDie, dwarf::DW_AT_explicit);
1109 } else if (Element.isDerivedType()) {
1110 DIDerivedType DDTy(Element);
1111 if (DDTy.getTag() == dwarf::DW_TAG_friend) {
1112 ElemDie = new DIE(dwarf::DW_TAG_friend);
1113 addType(ElemDie, resolve(DDTy.getTypeDerivedFrom()),
1114 dwarf::DW_AT_friend);
1115 } else if (DDTy.isStaticMember())
1116 ElemDie = createStaticMemberDIE(DDTy);
1118 ElemDie = createMemberDIE(DDTy);
1119 Buffer.addChild(ElemDie);
1120 } else if (Element.isObjCProperty()) {
1121 DIObjCProperty Property(Element);
1122 ElemDie = new DIE(Property.getTag());
1123 StringRef PropertyName = Property.getObjCPropertyName();
1124 addString(ElemDie, dwarf::DW_AT_APPLE_property_name, PropertyName);
1125 addType(ElemDie, Property.getType());
1126 addSourceLine(ElemDie, Property);
1127 StringRef GetterName = Property.getObjCPropertyGetterName();
1128 if (!GetterName.empty())
1129 addString(ElemDie, dwarf::DW_AT_APPLE_property_getter, GetterName);
1130 StringRef SetterName = Property.getObjCPropertySetterName();
1131 if (!SetterName.empty())
1132 addString(ElemDie, dwarf::DW_AT_APPLE_property_setter, SetterName);
1133 unsigned PropertyAttributes = 0;
1134 if (Property.isReadOnlyObjCProperty())
1135 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_readonly;
1136 if (Property.isReadWriteObjCProperty())
1137 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_readwrite;
1138 if (Property.isAssignObjCProperty())
1139 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_assign;
1140 if (Property.isRetainObjCProperty())
1141 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_retain;
1142 if (Property.isCopyObjCProperty())
1143 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_copy;
1144 if (Property.isNonAtomicObjCProperty())
1145 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_nonatomic;
1146 if (PropertyAttributes)
1147 addUInt(ElemDie, dwarf::DW_AT_APPLE_property_attribute, 0,
1148 PropertyAttributes);
1150 DIEEntry *Entry = getDIEEntry(Element);
1152 Entry = createDIEEntry(ElemDie);
1153 insertDIEEntry(Element, Entry);
1155 Buffer.addChild(ElemDie);
1160 if (CTy.isAppleBlockExtension())
1161 addFlag(&Buffer, dwarf::DW_AT_APPLE_block);
1163 DICompositeType ContainingType(resolve(CTy.getContainingType()));
1164 if (DIDescriptor(ContainingType).isCompositeType())
1165 addDIEEntry(&Buffer, dwarf::DW_AT_containing_type,
1166 getOrCreateTypeDIE(DIType(ContainingType)));
1168 if (CTy.isObjcClassComplete())
1169 addFlag(&Buffer, dwarf::DW_AT_APPLE_objc_complete_type);
1171 // Add template parameters to a class, structure or union types.
1172 // FIXME: The support isn't in the metadata for this yet.
1173 if (Tag == dwarf::DW_TAG_class_type ||
1174 Tag == dwarf::DW_TAG_structure_type ||
1175 Tag == dwarf::DW_TAG_union_type)
1176 addTemplateParams(Buffer, CTy.getTemplateParams());
1184 // Add name if not anonymous or intermediate type.
1186 addString(&Buffer, dwarf::DW_AT_name, Name);
1188 if (Tag == dwarf::DW_TAG_enumeration_type ||
1189 Tag == dwarf::DW_TAG_class_type ||
1190 Tag == dwarf::DW_TAG_structure_type ||
1191 Tag == dwarf::DW_TAG_union_type) {
1192 // Add size if non-zero (derived types might be zero-sized.)
1193 // TODO: Do we care about size for enum forward declarations?
1195 addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
1196 else if (!CTy.isForwardDecl())
1197 // Add zero size if it is not a forward declaration.
1198 addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, 0);
1200 // If we're a forward decl, say so.
1201 if (CTy.isForwardDecl())
1202 addFlag(&Buffer, dwarf::DW_AT_declaration);
1204 // Add source line info if available.
1205 if (!CTy.isForwardDecl())
1206 addSourceLine(&Buffer, CTy);
1208 // No harm in adding the runtime language to the declaration.
1209 unsigned RLang = CTy.getRunTimeLang();
1211 addUInt(&Buffer, dwarf::DW_AT_APPLE_runtime_class,
1212 dwarf::DW_FORM_data1, RLang);
1214 // If this is a type applicable to a type unit it then add it to the
1215 // list of types we'll compute a hash for later.
1216 if (shouldCreateTypeUnit(CTy, DD))
1217 DD->addTypeUnitType(&Buffer);
1220 /// getOrCreateTemplateTypeParameterDIE - Find existing DIE or create new DIE
1221 /// for the given DITemplateTypeParameter.
1223 CompileUnit::getOrCreateTemplateTypeParameterDIE(DITemplateTypeParameter TP) {
1224 DIE *ParamDIE = getDIE(TP);
1228 ParamDIE = new DIE(dwarf::DW_TAG_template_type_parameter);
1229 // Add the type if it exists, it could be void and therefore no type.
1231 addType(ParamDIE, resolve(TP.getType()));
1232 if (!TP.getName().empty())
1233 addString(ParamDIE, dwarf::DW_AT_name, TP.getName());
1237 /// getOrCreateTemplateValueParameterDIE - Find existing DIE or create new DIE
1238 /// for the given DITemplateValueParameter.
1240 CompileUnit::getOrCreateTemplateValueParameterDIE(DITemplateValueParameter VP) {
1241 DIE *ParamDIE = getDIE(VP);
1245 ParamDIE = new DIE(VP.getTag());
1247 // Add the type if there is one, template template and template parameter
1248 // packs will not have a type.
1250 addType(ParamDIE, resolve(VP.getType()));
1251 if (!VP.getName().empty())
1252 addString(ParamDIE, dwarf::DW_AT_name, VP.getName());
1253 if (Value *Val = VP.getValue()) {
1254 if (ConstantInt *CI = dyn_cast<ConstantInt>(Val))
1255 addConstantValue(ParamDIE, CI,
1256 isUnsignedDIType(DD, resolve(VP.getType())));
1257 else if (GlobalValue *GV = dyn_cast<GlobalValue>(Val)) {
1258 // For declaration non-type template parameters (such as global values and
1260 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
1261 addOpAddress(Block, Asm->Mang->getSymbol(GV));
1262 // Emit DW_OP_stack_value to use the address as the immediate value of the
1263 // parameter, rather than a pointer to it.
1264 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_stack_value);
1265 addBlock(ParamDIE, dwarf::DW_AT_location, 0, Block);
1266 } else if (VP.getTag() == dwarf::DW_TAG_GNU_template_template_param) {
1267 assert(isa<MDString>(Val));
1268 addString(ParamDIE, dwarf::DW_AT_GNU_template_name,
1269 cast<MDString>(Val)->getString());
1270 } else if (VP.getTag() == dwarf::DW_TAG_GNU_template_parameter_pack) {
1271 assert(isa<MDNode>(Val));
1272 DIArray A(cast<MDNode>(Val));
1273 addTemplateParams(*ParamDIE, A);
1280 /// getOrCreateNameSpace - Create a DIE for DINameSpace.
1281 DIE *CompileUnit::getOrCreateNameSpace(DINameSpace NS) {
1282 DIE *NDie = getDIE(NS);
1285 NDie = new DIE(dwarf::DW_TAG_namespace);
1286 insertDIE(NS, NDie);
1287 if (!NS.getName().empty()) {
1288 addString(NDie, dwarf::DW_AT_name, NS.getName());
1289 addAccelNamespace(NS.getName(), NDie);
1290 addGlobalName(NS.getName(), NDie);
1292 addAccelNamespace("(anonymous namespace)", NDie);
1293 addSourceLine(NDie, NS);
1294 addToContextOwner(NDie, NS.getContext());
1298 /// getOrCreateSubprogramDIE - Create new DIE using SP.
1299 DIE *CompileUnit::getOrCreateSubprogramDIE(DISubprogram SP) {
1300 // Construct the context before querying for the existence of the DIE in case
1301 // such construction creates the DIE (as is the case for member function
1303 DIE *ContextDIE = getOrCreateContextDIE(resolve(SP.getContext()));
1305 ContextDIE = CUDie.get();
1307 DIE *SPDie = getDIE(SP);
1311 SPDie = new DIE(dwarf::DW_TAG_subprogram);
1313 // DW_TAG_inlined_subroutine may refer to this DIE.
1314 insertDIE(SP, SPDie);
1316 DISubprogram SPDecl = SP.getFunctionDeclaration();
1317 DIE *DeclDie = NULL;
1318 if (SPDecl.isSubprogram()) {
1319 DeclDie = getOrCreateSubprogramDIE(SPDecl);
1322 // Add to context owner.
1323 ContextDIE->addChild(SPDie);
1325 // Add function template parameters.
1326 addTemplateParams(*SPDie, SP.getTemplateParams());
1328 // If this DIE is going to refer declaration info using AT_specification
1329 // then there is no need to add other attributes.
1331 // Refer function declaration directly.
1332 addDIEEntry(SPDie, dwarf::DW_AT_specification, DeclDie);
1337 // Add the linkage name if we have one.
1338 StringRef LinkageName = SP.getLinkageName();
1339 if (!LinkageName.empty())
1340 addString(SPDie, dwarf::DW_AT_MIPS_linkage_name,
1341 GlobalValue::getRealLinkageName(LinkageName));
1343 // Constructors and operators for anonymous aggregates do not have names.
1344 if (!SP.getName().empty())
1345 addString(SPDie, dwarf::DW_AT_name, SP.getName());
1347 addSourceLine(SPDie, SP);
1349 // Add the prototype if we have a prototype and we have a C like
1351 uint16_t Language = DICompileUnit(Node).getLanguage();
1352 if (SP.isPrototyped() &&
1353 (Language == dwarf::DW_LANG_C89 ||
1354 Language == dwarf::DW_LANG_C99 ||
1355 Language == dwarf::DW_LANG_ObjC))
1356 addFlag(SPDie, dwarf::DW_AT_prototyped);
1358 // Add Return Type. A void return type will not have a type.
1359 DICompositeType SPTy = SP.getType();
1360 assert(SPTy.getTag() == dwarf::DW_TAG_subroutine_type &&
1361 "the type of a subprogram should be a subroutine");
1363 DIArray Args = SPTy.getTypeArray();
1364 if (Args.getElement(0))
1365 addType(SPDie, DIType(Args.getElement(0)));
1367 unsigned VK = SP.getVirtuality();
1369 addUInt(SPDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_data1, VK);
1370 DIEBlock *Block = getDIEBlock();
1371 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
1372 addUInt(Block, 0, dwarf::DW_FORM_udata, SP.getVirtualIndex());
1373 addBlock(SPDie, dwarf::DW_AT_vtable_elem_location, 0, Block);
1374 ContainingTypeMap.insert(std::make_pair(SPDie,
1375 resolve(SP.getContainingType())));
1378 if (!SP.isDefinition()) {
1379 addFlag(SPDie, dwarf::DW_AT_declaration);
1381 // Add arguments. Do not add arguments for subprogram definition. They will
1382 // be handled while processing variables.
1383 for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
1384 DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
1385 DIType ATy = DIType(Args.getElement(i));
1387 if (ATy.isArtificial())
1388 addFlag(Arg, dwarf::DW_AT_artificial);
1389 SPDie->addChild(Arg);
1393 if (SP.isArtificial())
1394 addFlag(SPDie, dwarf::DW_AT_artificial);
1396 if (!SP.isLocalToUnit())
1397 addFlag(SPDie, dwarf::DW_AT_external);
1399 if (SP.isOptimized())
1400 addFlag(SPDie, dwarf::DW_AT_APPLE_optimized);
1402 if (unsigned isa = Asm->getISAEncoding()) {
1403 addUInt(SPDie, dwarf::DW_AT_APPLE_isa, dwarf::DW_FORM_flag, isa);
1409 // Return const expression if value is a GEP to access merged global
1411 // i8* getelementptr ({ i8, i8, i8, i8 }* @_MergedGlobals, i32 0, i32 0)
1412 static const ConstantExpr *getMergedGlobalExpr(const Value *V) {
1413 const ConstantExpr *CE = dyn_cast_or_null<ConstantExpr>(V);
1414 if (!CE || CE->getNumOperands() != 3 ||
1415 CE->getOpcode() != Instruction::GetElementPtr)
1418 // First operand points to a global struct.
1419 Value *Ptr = CE->getOperand(0);
1420 if (!isa<GlobalValue>(Ptr) ||
1421 !isa<StructType>(cast<PointerType>(Ptr->getType())->getElementType()))
1424 // Second operand is zero.
1425 const ConstantInt *CI = dyn_cast_or_null<ConstantInt>(CE->getOperand(1));
1426 if (!CI || !CI->isZero())
1429 // Third operand is offset.
1430 if (!isa<ConstantInt>(CE->getOperand(2)))
1436 /// createGlobalVariableDIE - create global variable DIE.
1437 void CompileUnit::createGlobalVariableDIE(const MDNode *N) {
1438 // Check for pre-existence.
1442 DIGlobalVariable GV(N);
1443 if (!GV.isGlobalVariable())
1446 DIScope GVContext = GV.getContext();
1447 DIType GTy = GV.getType();
1449 // If this is a static data member definition, some attributes belong
1450 // to the declaration DIE.
1451 DIE *VariableDIE = NULL;
1452 bool IsStaticMember = false;
1453 DIDerivedType SDMDecl = GV.getStaticDataMemberDeclaration();
1454 if (SDMDecl.Verify()) {
1455 assert(SDMDecl.isStaticMember() && "Expected static member decl");
1456 // We need the declaration DIE that is in the static member's class.
1457 // But that class might not exist in the DWARF yet.
1458 // Creating the class will create the static member decl DIE.
1459 getOrCreateContextDIE(resolve(SDMDecl.getContext()));
1460 VariableDIE = getDIE(SDMDecl);
1461 assert(VariableDIE && "Static member decl has no context?");
1462 IsStaticMember = true;
1465 // If this is not a static data member definition, create the variable
1466 // DIE and add the initial set of attributes to it.
1468 VariableDIE = new DIE(GV.getTag());
1470 insertDIE(N, VariableDIE);
1472 // Add name and type.
1473 addString(VariableDIE, dwarf::DW_AT_name, GV.getDisplayName());
1474 addType(VariableDIE, GTy);
1476 // Add scoping info.
1477 if (!GV.isLocalToUnit()) {
1478 addFlag(VariableDIE, dwarf::DW_AT_external);
1479 addGlobalName(GV.getName(), VariableDIE);
1482 // Add line number info.
1483 addSourceLine(VariableDIE, GV);
1484 // Add to context owner.
1485 addToContextOwner(VariableDIE, GVContext);
1489 bool addToAccelTable = false;
1490 DIE *VariableSpecDIE = NULL;
1491 bool isGlobalVariable = GV.getGlobal() != NULL;
1492 if (isGlobalVariable) {
1493 addToAccelTable = true;
1494 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
1495 const MCSymbol *Sym = Asm->Mang->getSymbol(GV.getGlobal());
1496 if (GV.getGlobal()->isThreadLocal()) {
1497 // FIXME: Make this work with -gsplit-dwarf.
1498 unsigned PointerSize = Asm->getDataLayout().getPointerSize();
1499 assert((PointerSize == 4 || PointerSize == 8) &&
1500 "Add support for other sizes if necessary");
1501 const MCExpr *Expr =
1502 Asm->getObjFileLowering().getDebugThreadLocalSymbol(Sym);
1503 // Based on GCC's support for TLS:
1504 if (!DD->useSplitDwarf()) {
1505 // 1) Start with a constNu of the appropriate pointer size
1506 addUInt(Block, 0, dwarf::DW_FORM_data1,
1507 PointerSize == 4 ? dwarf::DW_OP_const4u : dwarf::DW_OP_const8u);
1508 // 2) containing the (relocated) offset of the TLS variable
1509 // within the module's TLS block.
1510 addExpr(Block, 0, dwarf::DW_FORM_udata, Expr);
1512 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_GNU_const_index);
1513 addUInt(Block, 0, dwarf::DW_FORM_udata, DU->getAddrPoolIndex(Expr));
1515 // 3) followed by a custom OP to make the debugger do a TLS lookup.
1516 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_GNU_push_tls_address);
1518 addOpAddress(Block, Sym);
1519 // Do not create specification DIE if context is either compile unit
1521 if (GVContext && GV.isDefinition() && !GVContext.isCompileUnit() &&
1522 !GVContext.isFile() && !DD->isSubprogramContext(GVContext)) {
1523 // Create specification DIE.
1524 VariableSpecDIE = new DIE(dwarf::DW_TAG_variable);
1525 addDIEEntry(VariableSpecDIE, dwarf::DW_AT_specification, VariableDIE);
1526 addBlock(VariableSpecDIE, dwarf::DW_AT_location, 0, Block);
1527 // A static member's declaration is already flagged as such.
1528 if (!SDMDecl.Verify())
1529 addFlag(VariableDIE, dwarf::DW_AT_declaration);
1530 addDie(VariableSpecDIE);
1532 addBlock(VariableDIE, dwarf::DW_AT_location, 0, Block);
1534 // Add the linkage name.
1535 StringRef LinkageName = GV.getLinkageName();
1536 if (!LinkageName.empty())
1537 // From DWARF4: DIEs to which DW_AT_linkage_name may apply include:
1538 // TAG_common_block, TAG_constant, TAG_entry_point, TAG_subprogram and
1540 addString(IsStaticMember && VariableSpecDIE ?
1541 VariableSpecDIE : VariableDIE, dwarf::DW_AT_MIPS_linkage_name,
1542 GlobalValue::getRealLinkageName(LinkageName));
1543 } else if (const ConstantInt *CI =
1544 dyn_cast_or_null<ConstantInt>(GV.getConstant())) {
1545 // AT_const_value was added when the static member was created. To avoid
1546 // emitting AT_const_value multiple times, we only add AT_const_value when
1547 // it is not a static member.
1548 if (!IsStaticMember)
1549 addConstantValue(VariableDIE, CI, isUnsignedDIType(DD, GTy));
1550 } else if (const ConstantExpr *CE = getMergedGlobalExpr(N->getOperand(11))) {
1551 addToAccelTable = true;
1552 // GV is a merged global.
1553 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
1554 Value *Ptr = CE->getOperand(0);
1555 addOpAddress(Block, Asm->Mang->getSymbol(cast<GlobalValue>(Ptr)));
1556 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
1557 SmallVector<Value*, 3> Idx(CE->op_begin()+1, CE->op_end());
1558 addUInt(Block, 0, dwarf::DW_FORM_udata,
1559 Asm->getDataLayout().getIndexedOffset(Ptr->getType(), Idx));
1560 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
1561 addBlock(VariableDIE, dwarf::DW_AT_location, 0, Block);
1564 if (addToAccelTable) {
1565 DIE *AddrDIE = VariableSpecDIE ? VariableSpecDIE : VariableDIE;
1566 addAccelName(GV.getName(), AddrDIE);
1568 // If the linkage name is different than the name, go ahead and output
1569 // that as well into the name table.
1570 if (GV.getLinkageName() != "" && GV.getName() != GV.getLinkageName())
1571 addAccelName(GV.getLinkageName(), AddrDIE);
1575 /// constructSubrangeDIE - Construct subrange DIE from DISubrange.
1576 void CompileUnit::constructSubrangeDIE(DIE &Buffer, DISubrange SR,
1578 DIE *DW_Subrange = new DIE(dwarf::DW_TAG_subrange_type);
1579 addDIEEntry(DW_Subrange, dwarf::DW_AT_type, IndexTy);
1581 // The LowerBound value defines the lower bounds which is typically zero for
1582 // C/C++. The Count value is the number of elements. Values are 64 bit. If
1583 // Count == -1 then the array is unbounded and we do not emit
1584 // DW_AT_lower_bound and DW_AT_upper_bound attributes. If LowerBound == 0 and
1585 // Count == 0, then the array has zero elements in which case we do not emit
1587 int64_t LowerBound = SR.getLo();
1588 int64_t DefaultLowerBound = getDefaultLowerBound();
1589 int64_t Count = SR.getCount();
1591 if (DefaultLowerBound == -1 || LowerBound != DefaultLowerBound)
1592 addUInt(DW_Subrange, dwarf::DW_AT_lower_bound, 0, LowerBound);
1594 if (Count != -1 && Count != 0)
1595 // FIXME: An unbounded array should reference the expression that defines
1597 addUInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, LowerBound + Count - 1);
1599 Buffer.addChild(DW_Subrange);
1602 /// constructArrayTypeDIE - Construct array type DIE from DICompositeType.
1603 void CompileUnit::constructArrayTypeDIE(DIE &Buffer,
1604 DICompositeType *CTy) {
1605 if (CTy->isVector())
1606 addFlag(&Buffer, dwarf::DW_AT_GNU_vector);
1608 // Emit the element type.
1609 addType(&Buffer, resolve(CTy->getTypeDerivedFrom()));
1611 // Get an anonymous type for index type.
1612 // FIXME: This type should be passed down from the front end
1613 // as different languages may have different sizes for indexes.
1614 DIE *IdxTy = getIndexTyDie();
1616 // Construct an anonymous type for index type.
1617 IdxTy = new DIE(dwarf::DW_TAG_base_type);
1618 addString(IdxTy, dwarf::DW_AT_name, "int");
1619 addUInt(IdxTy, dwarf::DW_AT_byte_size, 0, sizeof(int32_t));
1620 addUInt(IdxTy, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
1621 dwarf::DW_ATE_signed);
1623 setIndexTyDie(IdxTy);
1626 // Add subranges to array type.
1627 DIArray Elements = CTy->getTypeArray();
1628 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
1629 DIDescriptor Element = Elements.getElement(i);
1630 if (Element.getTag() == dwarf::DW_TAG_subrange_type)
1631 constructSubrangeDIE(Buffer, DISubrange(Element), IdxTy);
1635 /// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
1636 DIE *CompileUnit::constructEnumTypeDIE(DIEnumerator ETy) {
1637 DIE *Enumerator = new DIE(dwarf::DW_TAG_enumerator);
1638 StringRef Name = ETy.getName();
1639 addString(Enumerator, dwarf::DW_AT_name, Name);
1640 int64_t Value = ETy.getEnumValue();
1641 addSInt(Enumerator, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, Value);
1645 /// constructContainingTypeDIEs - Construct DIEs for types that contain
1647 void CompileUnit::constructContainingTypeDIEs() {
1648 for (DenseMap<DIE *, const MDNode *>::iterator CI = ContainingTypeMap.begin(),
1649 CE = ContainingTypeMap.end(); CI != CE; ++CI) {
1650 DIE *SPDie = CI->first;
1651 const MDNode *N = CI->second;
1653 DIE *NDie = getDIE(N);
1654 if (!NDie) continue;
1655 addDIEEntry(SPDie, dwarf::DW_AT_containing_type, NDie);
1659 /// constructVariableDIE - Construct a DIE for the given DbgVariable.
1660 DIE *CompileUnit::constructVariableDIE(DbgVariable *DV,
1661 bool isScopeAbstract) {
1662 StringRef Name = DV->getName();
1664 // Define variable debug information entry.
1665 DIE *VariableDie = new DIE(DV->getTag());
1666 DbgVariable *AbsVar = DV->getAbstractVariable();
1667 DIE *AbsDIE = AbsVar ? AbsVar->getDIE() : NULL;
1669 addDIEEntry(VariableDie, dwarf::DW_AT_abstract_origin, AbsDIE);
1672 addString(VariableDie, dwarf::DW_AT_name, Name);
1673 addSourceLine(VariableDie, DV->getVariable());
1674 addType(VariableDie, DV->getType());
1677 if (DV->isArtificial())
1678 addFlag(VariableDie, dwarf::DW_AT_artificial);
1680 if (isScopeAbstract) {
1681 DV->setDIE(VariableDie);
1685 // Add variable address.
1687 unsigned Offset = DV->getDotDebugLocOffset();
1688 if (Offset != ~0U) {
1689 addLabel(VariableDie, dwarf::DW_AT_location, dwarf::DW_FORM_data4,
1690 Asm->GetTempSymbol("debug_loc", Offset));
1691 DV->setDIE(VariableDie);
1695 // Check if variable is described by a DBG_VALUE instruction.
1696 if (const MachineInstr *DVInsn = DV->getMInsn()) {
1697 assert(DVInsn->getNumOperands() == 3);
1698 if (DVInsn->getOperand(0).isReg()) {
1699 const MachineOperand RegOp = DVInsn->getOperand(0);
1700 // If the second operand is an immediate, this is an indirect value.
1701 if (DVInsn->getOperand(1).isImm()) {
1702 MachineLocation Location(RegOp.getReg(), DVInsn->getOperand(1).getImm());
1703 addVariableAddress(*DV, VariableDie, Location);
1704 } else if (RegOp.getReg())
1705 addVariableAddress(*DV, VariableDie, MachineLocation(RegOp.getReg()));
1706 } else if (DVInsn->getOperand(0).isImm())
1707 addConstantValue(VariableDie, DVInsn->getOperand(0), DV->getType());
1708 else if (DVInsn->getOperand(0).isFPImm())
1709 addConstantFPValue(VariableDie, DVInsn->getOperand(0));
1710 else if (DVInsn->getOperand(0).isCImm())
1711 addConstantValue(VariableDie, DVInsn->getOperand(0).getCImm(),
1712 isUnsignedDIType(DD, DV->getType()));
1714 DV->setDIE(VariableDie);
1717 // .. else use frame index.
1718 int FI = DV->getFrameIndex();
1720 unsigned FrameReg = 0;
1721 const TargetFrameLowering *TFI = Asm->TM.getFrameLowering();
1723 TFI->getFrameIndexReference(*Asm->MF, FI, FrameReg);
1724 MachineLocation Location(FrameReg, Offset);
1725 addVariableAddress(*DV, VariableDie, Location);
1729 DV->setDIE(VariableDie);
1733 /// createMemberDIE - Create new member DIE.
1734 DIE *CompileUnit::createMemberDIE(DIDerivedType DT) {
1735 DIE *MemberDie = new DIE(DT.getTag());
1736 StringRef Name = DT.getName();
1738 addString(MemberDie, dwarf::DW_AT_name, Name);
1740 addType(MemberDie, resolve(DT.getTypeDerivedFrom()));
1742 addSourceLine(MemberDie, DT);
1744 DIEBlock *MemLocationDie = new (DIEValueAllocator) DIEBlock();
1745 addUInt(MemLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
1747 uint64_t Size = DT.getSizeInBits();
1748 uint64_t FieldSize = getBaseTypeSize(DD, DT);
1750 if (Size != FieldSize) {
1752 addUInt(MemberDie, dwarf::DW_AT_byte_size, 0,
1753 getBaseTypeSize(DD, DT)>>3);
1754 addUInt(MemberDie, dwarf::DW_AT_bit_size, 0, DT.getSizeInBits());
1756 uint64_t Offset = DT.getOffsetInBits();
1757 uint64_t AlignMask = ~(DT.getAlignInBits() - 1);
1758 uint64_t HiMark = (Offset + FieldSize) & AlignMask;
1759 uint64_t FieldOffset = (HiMark - FieldSize);
1760 Offset -= FieldOffset;
1762 // Maybe we need to work from the other end.
1763 if (Asm->getDataLayout().isLittleEndian())
1764 Offset = FieldSize - (Offset + Size);
1765 addUInt(MemberDie, dwarf::DW_AT_bit_offset, 0, Offset);
1767 // Here WD_AT_data_member_location points to the anonymous
1768 // field that includes this bit field.
1769 addUInt(MemLocationDie, 0, dwarf::DW_FORM_udata, FieldOffset >> 3);
1772 // This is not a bitfield.
1773 addUInt(MemLocationDie, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits() >> 3);
1775 if (DT.getTag() == dwarf::DW_TAG_inheritance
1776 && DT.isVirtual()) {
1778 // For C++, virtual base classes are not at fixed offset. Use following
1779 // expression to extract appropriate offset from vtable.
1780 // BaseAddr = ObAddr + *((*ObAddr) - Offset)
1782 DIEBlock *VBaseLocationDie = new (DIEValueAllocator) DIEBlock();
1783 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_dup);
1784 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
1785 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
1786 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits());
1787 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_minus);
1788 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
1789 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
1791 addBlock(MemberDie, dwarf::DW_AT_data_member_location, 0,
1794 addBlock(MemberDie, dwarf::DW_AT_data_member_location, 0, MemLocationDie);
1796 if (DT.isProtected())
1797 addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1798 dwarf::DW_ACCESS_protected);
1799 else if (DT.isPrivate())
1800 addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1801 dwarf::DW_ACCESS_private);
1802 // Otherwise C++ member and base classes are considered public.
1804 addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1805 dwarf::DW_ACCESS_public);
1807 addUInt(MemberDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_data1,
1808 dwarf::DW_VIRTUALITY_virtual);
1810 // Objective-C properties.
1811 if (MDNode *PNode = DT.getObjCProperty())
1812 if (DIEEntry *PropertyDie = getDIEEntry(PNode))
1813 MemberDie->addValue(dwarf::DW_AT_APPLE_property, dwarf::DW_FORM_ref4,
1816 if (DT.isArtificial())
1817 addFlag(MemberDie, dwarf::DW_AT_artificial);
1822 /// createStaticMemberDIE - Create new DIE for C++ static member.
1823 DIE *CompileUnit::createStaticMemberDIE(const DIDerivedType DT) {
1827 DIE *StaticMemberDIE = new DIE(DT.getTag());
1828 DIType Ty = resolve(DT.getTypeDerivedFrom());
1830 addString(StaticMemberDIE, dwarf::DW_AT_name, DT.getName());
1831 addType(StaticMemberDIE, Ty);
1832 addSourceLine(StaticMemberDIE, DT);
1833 addFlag(StaticMemberDIE, dwarf::DW_AT_external);
1834 addFlag(StaticMemberDIE, dwarf::DW_AT_declaration);
1836 // FIXME: We could omit private if the parent is a class_type, and
1837 // public if the parent is something else.
1838 if (DT.isProtected())
1839 addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1840 dwarf::DW_ACCESS_protected);
1841 else if (DT.isPrivate())
1842 addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1843 dwarf::DW_ACCESS_private);
1845 addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1846 dwarf::DW_ACCESS_public);
1848 if (const ConstantInt *CI = dyn_cast_or_null<ConstantInt>(DT.getConstant()))
1849 addConstantValue(StaticMemberDIE, CI, isUnsignedDIType(DD, Ty));
1850 if (const ConstantFP *CFP = dyn_cast_or_null<ConstantFP>(DT.getConstant()))
1851 addConstantFPValue(StaticMemberDIE, CFP);
1853 insertDIE(DT, StaticMemberDIE);
1854 return StaticMemberDIE;