1 //===- DebugInfo.h - Debug Information Helpers ------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file defines a bunch of datatypes that are useful for creating and
11 // walking debug info in LLVM IR form. They essentially provide wrappers around
12 // the information in the global variables that's needed when constructing the
15 //===----------------------------------------------------------------------===//
17 #ifndef LLVM_IR_DEBUGINFO_H
18 #define LLVM_IR_DEBUGINFO_H
20 #include "llvm/ADT/DenseMap.h"
21 #include "llvm/ADT/SmallPtrSet.h"
22 #include "llvm/ADT/SmallVector.h"
23 #include "llvm/ADT/StringRef.h"
24 #include "llvm/IR/Metadata.h"
25 #include "llvm/Support/Casting.h"
26 #include "llvm/Support/Dwarf.h"
48 class DILexicalBlockFile;
54 /// Maps from type identifier to the actual MDNode.
55 typedef DenseMap<const MDString *, MDNode *> DITypeIdentifierMap;
57 /// DIDescriptor - A thin wraper around MDNode to access encoded debug info.
58 /// This should not be stored in a container, because the underlying MDNode
59 /// may change in certain situations.
61 // Befriends DIRef so DIRef can befriend the protected member
62 // function: getFieldAs<DIRef>.
63 template <typename T> friend class DIRef;
68 FlagProtected = 1 << 1,
70 FlagAppleBlock = 1 << 3,
71 FlagBlockByrefStruct = 1 << 4,
73 FlagArtificial = 1 << 6,
74 FlagExplicit = 1 << 7,
75 FlagPrototyped = 1 << 8,
76 FlagObjcClassComplete = 1 << 9,
77 FlagObjectPointer = 1 << 10,
79 FlagStaticMember = 1 << 12,
80 FlagIndirectVariable = 1 << 13,
81 FlagLValueReference = 1 << 14,
82 FlagRValueReference = 1 << 15
86 const MDNode *DbgNode;
88 StringRef getStringField(unsigned Elt) const;
89 unsigned getUnsignedField(unsigned Elt) const {
90 return (unsigned)getUInt64Field(Elt);
92 uint64_t getUInt64Field(unsigned Elt) const;
93 int64_t getInt64Field(unsigned Elt) const;
94 DIDescriptor getDescriptorField(unsigned Elt) const;
96 template <typename DescTy> DescTy getFieldAs(unsigned Elt) const {
97 return DescTy(getDescriptorField(Elt));
100 GlobalVariable *getGlobalVariableField(unsigned Elt) const;
101 Constant *getConstantField(unsigned Elt) const;
102 Function *getFunctionField(unsigned Elt) const;
103 void replaceFunctionField(unsigned Elt, Function *F);
106 explicit DIDescriptor(const MDNode *N = 0) : DbgNode(N) {}
110 operator MDNode *() const { return const_cast<MDNode *>(DbgNode); }
111 MDNode *operator->() const { return const_cast<MDNode *>(DbgNode); }
113 // An explicit operator bool so that we can do testing of DI values
115 // FIXME: This operator bool isn't actually protecting anything at the
116 // moment due to the conversion operator above making DIDescriptor nodes
117 // implicitly convertable to bool.
118 LLVM_EXPLICIT operator bool() const { return DbgNode != 0; }
120 bool operator==(DIDescriptor Other) const { return DbgNode == Other.DbgNode; }
121 bool operator!=(DIDescriptor Other) const { return !operator==(Other); }
123 uint16_t getTag() const {
124 return getUnsignedField(0) & ~LLVMDebugVersionMask;
127 bool isDerivedType() const;
128 bool isCompositeType() const;
129 bool isBasicType() const;
130 bool isVariable() const;
131 bool isSubprogram() const;
132 bool isGlobalVariable() const;
133 bool isScope() const;
135 bool isCompileUnit() const;
136 bool isNameSpace() const;
137 bool isLexicalBlockFile() const;
138 bool isLexicalBlock() const;
139 bool isSubrange() const;
140 bool isEnumerator() const;
142 bool isUnspecifiedParameter() const;
143 bool isTemplateTypeParameter() const;
144 bool isTemplateValueParameter() const;
145 bool isObjCProperty() const;
146 bool isImportedEntity() const;
148 /// print - print descriptor.
149 void print(raw_ostream &OS) const;
151 /// dump - print descriptor to dbgs() with a newline.
155 /// DISubrange - This is used to represent ranges, for array bounds.
156 class DISubrange : public DIDescriptor {
157 friend class DIDescriptor;
158 void printInternal(raw_ostream &OS) const;
161 explicit DISubrange(const MDNode *N = 0) : DIDescriptor(N) {}
163 int64_t getLo() const { return getInt64Field(1); }
164 int64_t getCount() const { return getInt64Field(2); }
168 /// DIArray - This descriptor holds an array of descriptors.
169 class DIArray : public DIDescriptor {
171 explicit DIArray(const MDNode *N = 0) : DIDescriptor(N) {}
173 unsigned getNumElements() const;
174 DIDescriptor getElement(unsigned Idx) const {
175 return getDescriptorField(Idx);
179 /// DIEnumerator - A wrapper for an enumerator (e.g. X and Y in 'enum {X,Y}').
180 /// FIXME: it seems strange that this doesn't have either a reference to the
181 /// type/precision or a file/line pair for location info.
182 class DIEnumerator : public DIDescriptor {
183 friend class DIDescriptor;
184 void printInternal(raw_ostream &OS) const;
187 explicit DIEnumerator(const MDNode *N = 0) : DIDescriptor(N) {}
189 StringRef getName() const { return getStringField(1); }
190 int64_t getEnumValue() const { return getInt64Field(2); }
194 template <typename T> class DIRef;
195 typedef DIRef<DIScope> DIScopeRef;
196 typedef DIRef<DIType> DITypeRef;
198 /// DIScope - A base class for various scopes.
199 class DIScope : public DIDescriptor {
201 friend class DIDescriptor;
202 void printInternal(raw_ostream &OS) const;
205 explicit DIScope(const MDNode *N = 0) : DIDescriptor(N) {}
207 /// Gets the parent scope for this scope node or returns a
208 /// default constructed scope.
209 DIScopeRef getContext() const;
210 /// If the scope node has a name, return that, else return an empty string.
211 StringRef getName() const;
212 StringRef getFilename() const;
213 StringRef getDirectory() const;
215 /// Generate a reference to this DIScope. Uses the type identifier instead
216 /// of the actual MDNode if possible, to help type uniquing.
217 DIScopeRef getRef() const;
220 /// Represents reference to a DIDescriptor, abstracts over direct and
221 /// identifier-based metadata references.
222 template <typename T> class DIRef {
223 template <typename DescTy>
224 friend DescTy DIDescriptor::getFieldAs(unsigned Elt) const;
225 friend DIScopeRef DIScope::getContext() const;
226 friend DIScopeRef DIScope::getRef() const;
229 /// Val can be either a MDNode or a MDString, in the latter,
230 /// MDString specifies the type identifier.
232 explicit DIRef(const Value *V);
235 T resolve(const DITypeIdentifierMap &Map) const;
236 StringRef getName() const;
237 operator Value *() const { return const_cast<Value *>(Val); }
240 template <typename T>
241 T DIRef<T>::resolve(const DITypeIdentifierMap &Map) const {
245 if (const MDNode *MD = dyn_cast<MDNode>(Val))
248 const MDString *MS = cast<MDString>(Val);
249 // Find the corresponding MDNode.
250 DITypeIdentifierMap::const_iterator Iter = Map.find(MS);
251 assert(Iter != Map.end() && "Identifier not in the type map?");
252 assert(DIDescriptor(Iter->second).isType() &&
253 "MDNode in DITypeIdentifierMap should be a DIType.");
254 return T(Iter->second);
257 template <typename T> StringRef DIRef<T>::getName() const {
261 if (const MDNode *MD = dyn_cast<MDNode>(Val))
262 return T(MD).getName();
264 const MDString *MS = cast<MDString>(Val);
265 return MS->getString();
268 /// Specialize getFieldAs to handle fields that are references to DIScopes.
269 template <> DIScopeRef DIDescriptor::getFieldAs<DIScopeRef>(unsigned Elt) const;
270 /// Specialize DIRef constructor for DIScopeRef.
271 template <> DIRef<DIScope>::DIRef(const Value *V);
273 /// Specialize getFieldAs to handle fields that are references to DITypes.
274 template <> DITypeRef DIDescriptor::getFieldAs<DITypeRef>(unsigned Elt) const;
275 /// Specialize DIRef constructor for DITypeRef.
276 template <> DIRef<DIType>::DIRef(const Value *V);
278 /// DIType - This is a wrapper for a type.
279 /// FIXME: Types should be factored much better so that CV qualifiers and
280 /// others do not require a huge and empty descriptor full of zeros.
281 class DIType : public DIScope {
283 friend class DIDescriptor;
284 void printInternal(raw_ostream &OS) const;
287 explicit DIType(const MDNode *N = 0) : DIScope(N) {}
288 operator DITypeRef () const {
290 "constructing DITypeRef from an MDNode that is not a type");
291 return DITypeRef(&*getRef());
294 /// Verify - Verify that a type descriptor is well formed.
297 DIScopeRef getContext() const { return getFieldAs<DIScopeRef>(2); }
298 StringRef getName() const { return getStringField(3); }
299 unsigned getLineNumber() const { return getUnsignedField(4); }
300 uint64_t getSizeInBits() const { return getUInt64Field(5); }
301 uint64_t getAlignInBits() const { return getUInt64Field(6); }
302 // FIXME: Offset is only used for DW_TAG_member nodes. Making every type
303 // carry this is just plain insane.
304 uint64_t getOffsetInBits() const { return getUInt64Field(7); }
305 unsigned getFlags() const { return getUnsignedField(8); }
306 bool isPrivate() const { return (getFlags() & FlagPrivate) != 0; }
307 bool isProtected() const { return (getFlags() & FlagProtected) != 0; }
308 bool isForwardDecl() const { return (getFlags() & FlagFwdDecl) != 0; }
309 // isAppleBlock - Return true if this is the Apple Blocks extension.
310 bool isAppleBlockExtension() const {
311 return (getFlags() & FlagAppleBlock) != 0;
313 bool isBlockByrefStruct() const {
314 return (getFlags() & FlagBlockByrefStruct) != 0;
316 bool isVirtual() const { return (getFlags() & FlagVirtual) != 0; }
317 bool isArtificial() const { return (getFlags() & FlagArtificial) != 0; }
318 bool isObjectPointer() const { return (getFlags() & FlagObjectPointer) != 0; }
319 bool isObjcClassComplete() const {
320 return (getFlags() & FlagObjcClassComplete) != 0;
322 bool isVector() const { return (getFlags() & FlagVector) != 0; }
323 bool isStaticMember() const { return (getFlags() & FlagStaticMember) != 0; }
324 bool isLValueReference() const {
325 return (getFlags() & FlagLValueReference) != 0;
327 bool isRValueReference() const {
328 return (getFlags() & FlagRValueReference) != 0;
330 bool isValid() const { return DbgNode && isType(); }
332 /// replaceAllUsesWith - Replace all uses of debug info referenced by
334 void replaceAllUsesWith(DIDescriptor &D);
335 void replaceAllUsesWith(MDNode *D);
338 /// DIBasicType - A basic type, like 'int' or 'float'.
339 class DIBasicType : public DIType {
341 explicit DIBasicType(const MDNode *N = 0) : DIType(N) {}
343 unsigned getEncoding() const { return getUnsignedField(9); }
345 /// Verify - Verify that a basic type descriptor is well formed.
349 /// DIDerivedType - A simple derived type, like a const qualified type,
350 /// a typedef, a pointer or reference, et cetera. Or, a data member of
351 /// a class/struct/union.
352 class DIDerivedType : public DIType {
353 friend class DIDescriptor;
354 void printInternal(raw_ostream &OS) const;
357 explicit DIDerivedType(const MDNode *N = 0) : DIType(N) {}
359 DITypeRef getTypeDerivedFrom() const { return getFieldAs<DITypeRef>(9); }
361 /// getObjCProperty - Return property node, if this ivar is
362 /// associated with one.
363 MDNode *getObjCProperty() const;
365 DITypeRef getClassType() const {
366 assert(getTag() == dwarf::DW_TAG_ptr_to_member_type);
367 return getFieldAs<DITypeRef>(10);
370 Constant *getConstant() const {
371 assert((getTag() == dwarf::DW_TAG_member) && isStaticMember());
372 return getConstantField(10);
375 /// Verify - Verify that a derived type descriptor is well formed.
379 /// DICompositeType - This descriptor holds a type that can refer to multiple
380 /// other types, like a function or struct.
381 /// DICompositeType is derived from DIDerivedType because some
382 /// composite types (such as enums) can be derived from basic types
383 // FIXME: Make this derive from DIType directly & just store the
384 // base type in a single DIType field.
385 class DICompositeType : public DIDerivedType {
386 friend class DIDescriptor;
387 void printInternal(raw_ostream &OS) const;
390 explicit DICompositeType(const MDNode *N = 0) : DIDerivedType(N) {}
392 DIArray getTypeArray() const { return getFieldAs<DIArray>(10); }
393 void setTypeArray(DIArray Elements, DIArray TParams = DIArray());
394 unsigned getRunTimeLang() const { return getUnsignedField(11); }
395 DITypeRef getContainingType() const { return getFieldAs<DITypeRef>(12); }
396 void setContainingType(DICompositeType ContainingType);
397 DIArray getTemplateParams() const { return getFieldAs<DIArray>(13); }
398 MDString *getIdentifier() const;
400 /// Verify - Verify that a composite type descriptor is well formed.
404 /// DIFile - This is a wrapper for a file.
405 class DIFile : public DIScope {
406 friend class DIDescriptor;
409 explicit DIFile(const MDNode *N = 0) : DIScope(N) {}
410 MDNode *getFileNode() const;
414 /// DICompileUnit - A wrapper for a compile unit.
415 class DICompileUnit : public DIScope {
416 friend class DIDescriptor;
417 void printInternal(raw_ostream &OS) const;
420 explicit DICompileUnit(const MDNode *N = 0) : DIScope(N) {}
422 unsigned getLanguage() const { return getUnsignedField(2); }
423 StringRef getProducer() const { return getStringField(3); }
425 bool isOptimized() const { return getUnsignedField(4) != 0; }
426 StringRef getFlags() const { return getStringField(5); }
427 unsigned getRunTimeVersion() const { return getUnsignedField(6); }
429 DIArray getEnumTypes() const;
430 DIArray getRetainedTypes() const;
431 DIArray getSubprograms() const;
432 DIArray getGlobalVariables() const;
433 DIArray getImportedEntities() const;
435 StringRef getSplitDebugFilename() const { return getStringField(12); }
436 unsigned getEmissionKind() const { return getUnsignedField(13); }
438 /// Verify - Verify that a compile unit is well formed.
442 /// DISubprogram - This is a wrapper for a subprogram (e.g. a function).
443 class DISubprogram : public DIScope {
444 friend class DIDescriptor;
445 void printInternal(raw_ostream &OS) const;
448 explicit DISubprogram(const MDNode *N = 0) : DIScope(N) {}
450 DIScopeRef getContext() const { return getFieldAs<DIScopeRef>(2); }
451 StringRef getName() const { return getStringField(3); }
452 StringRef getDisplayName() const { return getStringField(4); }
453 StringRef getLinkageName() const { return getStringField(5); }
454 unsigned getLineNumber() const { return getUnsignedField(6); }
455 DICompositeType getType() const { return getFieldAs<DICompositeType>(7); }
457 /// isLocalToUnit - Return true if this subprogram is local to the current
458 /// compile unit, like 'static' in C.
459 unsigned isLocalToUnit() const { return getUnsignedField(8); }
460 unsigned isDefinition() const { return getUnsignedField(9); }
462 unsigned getVirtuality() const { return getUnsignedField(10); }
463 unsigned getVirtualIndex() const { return getUnsignedField(11); }
465 DITypeRef getContainingType() const { return getFieldAs<DITypeRef>(12); }
467 unsigned getFlags() const { return getUnsignedField(13); }
469 unsigned isArtificial() const {
470 return (getUnsignedField(13) & FlagArtificial) != 0;
472 /// isPrivate - Return true if this subprogram has "private"
473 /// access specifier.
474 bool isPrivate() const { return (getUnsignedField(13) & FlagPrivate) != 0; }
475 /// isProtected - Return true if this subprogram has "protected"
476 /// access specifier.
477 bool isProtected() const {
478 return (getUnsignedField(13) & FlagProtected) != 0;
480 /// isExplicit - Return true if this subprogram is marked as explicit.
481 bool isExplicit() const { return (getUnsignedField(13) & FlagExplicit) != 0; }
482 /// isPrototyped - Return true if this subprogram is prototyped.
483 bool isPrototyped() const {
484 return (getUnsignedField(13) & FlagPrototyped) != 0;
487 /// Return true if this subprogram is a C++11 reference-qualified
488 /// non-static member function (void foo() &).
489 unsigned isLValueReference() const {
490 return (getUnsignedField(13) & FlagLValueReference) != 0;
493 /// Return true if this subprogram is a C++11
494 /// rvalue-reference-qualified non-static member function
496 unsigned isRValueReference() const {
497 return (getUnsignedField(13) & FlagRValueReference) != 0;
500 unsigned isOptimized() const;
502 /// Verify - Verify that a subprogram descriptor is well formed.
505 /// describes - Return true if this subprogram provides debugging
506 /// information for the function F.
507 bool describes(const Function *F);
509 Function *getFunction() const { return getFunctionField(15); }
510 void replaceFunction(Function *F) { replaceFunctionField(15, F); }
511 DIArray getTemplateParams() const { return getFieldAs<DIArray>(16); }
512 DISubprogram getFunctionDeclaration() const {
513 return getFieldAs<DISubprogram>(17);
515 MDNode *getVariablesNodes() const;
516 DIArray getVariables() const;
518 /// getScopeLineNumber - Get the beginning of the scope of the
519 /// function, not necessarily where the name of the program
521 unsigned getScopeLineNumber() const { return getUnsignedField(19); }
524 /// DILexicalBlock - This is a wrapper for a lexical block.
525 class DILexicalBlock : public DIScope {
527 explicit DILexicalBlock(const MDNode *N = 0) : DIScope(N) {}
528 DIScope getContext() const { return getFieldAs<DIScope>(2); }
529 unsigned getLineNumber() const { return getUnsignedField(3); }
530 unsigned getColumnNumber() const { return getUnsignedField(4); }
531 unsigned getDiscriminator() const { return getUnsignedField(5); }
535 /// DILexicalBlockFile - This is a wrapper for a lexical block with
536 /// a filename change.
537 class DILexicalBlockFile : public DIScope {
539 explicit DILexicalBlockFile(const MDNode *N = 0) : DIScope(N) {}
540 DIScope getContext() const {
541 if (getScope().isSubprogram())
543 return getScope().getContext();
545 unsigned getLineNumber() const { return getScope().getLineNumber(); }
546 unsigned getColumnNumber() const { return getScope().getColumnNumber(); }
547 DILexicalBlock getScope() const { return getFieldAs<DILexicalBlock>(2); }
551 /// DINameSpace - A wrapper for a C++ style name space.
552 class DINameSpace : public DIScope {
553 friend class DIDescriptor;
554 void printInternal(raw_ostream &OS) const;
557 explicit DINameSpace(const MDNode *N = 0) : DIScope(N) {}
558 DIScope getContext() const { return getFieldAs<DIScope>(2); }
559 StringRef getName() const { return getStringField(3); }
560 unsigned getLineNumber() const { return getUnsignedField(4); }
564 /// DIUnspecifiedParameter - This is a wrapper for unspecified parameters.
565 class DIUnspecifiedParameter : public DIDescriptor {
567 explicit DIUnspecifiedParameter(const MDNode *N = 0) : DIDescriptor(N) {}
571 /// DITemplateTypeParameter - This is a wrapper for template type parameter.
572 class DITemplateTypeParameter : public DIDescriptor {
574 explicit DITemplateTypeParameter(const MDNode *N = 0) : DIDescriptor(N) {}
576 DIScopeRef getContext() const { return getFieldAs<DIScopeRef>(1); }
577 StringRef getName() const { return getStringField(2); }
578 DITypeRef getType() const { return getFieldAs<DITypeRef>(3); }
579 StringRef getFilename() const { return getFieldAs<DIFile>(4).getFilename(); }
580 StringRef getDirectory() const {
581 return getFieldAs<DIFile>(4).getDirectory();
583 unsigned getLineNumber() const { return getUnsignedField(5); }
584 unsigned getColumnNumber() const { return getUnsignedField(6); }
588 /// DITemplateValueParameter - This is a wrapper for template value parameter.
589 class DITemplateValueParameter : public DIDescriptor {
591 explicit DITemplateValueParameter(const MDNode *N = 0) : DIDescriptor(N) {}
593 DIScopeRef getContext() const { return getFieldAs<DIScopeRef>(1); }
594 StringRef getName() const { return getStringField(2); }
595 DITypeRef getType() const { return getFieldAs<DITypeRef>(3); }
596 Value *getValue() const;
597 StringRef getFilename() const { return getFieldAs<DIFile>(5).getFilename(); }
598 StringRef getDirectory() const {
599 return getFieldAs<DIFile>(5).getDirectory();
601 unsigned getLineNumber() const { return getUnsignedField(6); }
602 unsigned getColumnNumber() const { return getUnsignedField(7); }
606 /// DIGlobalVariable - This is a wrapper for a global variable.
607 class DIGlobalVariable : public DIDescriptor {
608 friend class DIDescriptor;
609 void printInternal(raw_ostream &OS) const;
612 explicit DIGlobalVariable(const MDNode *N = 0) : DIDescriptor(N) {}
614 // FIXME: use DIScopeRef for LTO type uniqueing.
615 DIScope getContext() const { return getFieldAs<DIScope>(2); }
616 StringRef getName() const { return getStringField(3); }
617 StringRef getDisplayName() const { return getStringField(4); }
618 StringRef getLinkageName() const { return getStringField(5); }
619 StringRef getFilename() const { return getFieldAs<DIFile>(6).getFilename(); }
620 StringRef getDirectory() const {
621 return getFieldAs<DIFile>(6).getDirectory();
624 unsigned getLineNumber() const { return getUnsignedField(7); }
625 DITypeRef getType() const { return getFieldAs<DITypeRef>(8); }
626 unsigned isLocalToUnit() const { return getUnsignedField(9); }
627 unsigned isDefinition() const { return getUnsignedField(10); }
629 GlobalVariable *getGlobal() const { return getGlobalVariableField(11); }
630 Constant *getConstant() const { return getConstantField(11); }
631 DIDerivedType getStaticDataMemberDeclaration() const {
632 return getFieldAs<DIDerivedType>(12);
635 /// Verify - Verify that a global variable descriptor is well formed.
639 /// DIVariable - This is a wrapper for a variable (e.g. parameter, local,
641 class DIVariable : public DIDescriptor {
642 friend class DIDescriptor;
643 void printInternal(raw_ostream &OS) const;
646 explicit DIVariable(const MDNode *N = 0) : DIDescriptor(N) {}
648 // FIXME: use DIScopeRef for LTO type uniqueing.
649 DIScope getContext() const { return getFieldAs<DIScope>(1); }
650 StringRef getName() const { return getStringField(2); }
651 DIFile getFile() const { return getFieldAs<DIFile>(3); }
652 unsigned getLineNumber() const { return (getUnsignedField(4) << 8) >> 8; }
653 unsigned getArgNumber() const {
654 unsigned L = getUnsignedField(4);
657 DITypeRef getType() const { return getFieldAs<DITypeRef>(5); }
659 /// isArtificial - Return true if this variable is marked as "artificial".
660 bool isArtificial() const {
661 return (getUnsignedField(6) & FlagArtificial) != 0;
664 bool isObjectPointer() const {
665 return (getUnsignedField(6) & FlagObjectPointer) != 0;
668 /// \brief Return true if this variable is represented as a pointer.
669 bool isIndirect() const {
670 return (getUnsignedField(6) & FlagIndirectVariable) != 0;
673 /// getInlinedAt - If this variable is inlined then return inline location.
674 MDNode *getInlinedAt() const;
676 /// Verify - Verify that a variable descriptor is well formed.
679 /// HasComplexAddr - Return true if the variable has a complex address.
680 bool hasComplexAddress() const { return getNumAddrElements() > 0; }
682 unsigned getNumAddrElements() const;
684 uint64_t getAddrElement(unsigned Idx) const {
685 return getUInt64Field(Idx + 8);
688 /// isBlockByrefVariable - Return true if the variable was declared as
689 /// a "__block" variable (Apple Blocks).
690 bool isBlockByrefVariable(const DITypeIdentifierMap &Map) const {
691 return (getType().resolve(Map)).isBlockByrefStruct();
694 /// isInlinedFnArgument - Return true if this variable provides debugging
695 /// information for an inlined function arguments.
696 bool isInlinedFnArgument(const Function *CurFn);
698 void printExtendedName(raw_ostream &OS) const;
701 /// DILocation - This object holds location information. This object
702 /// is not associated with any DWARF tag.
703 class DILocation : public DIDescriptor {
705 explicit DILocation(const MDNode *N) : DIDescriptor(N) {}
707 unsigned getLineNumber() const { return getUnsignedField(0); }
708 unsigned getColumnNumber() const { return getUnsignedField(1); }
709 DIScope getScope() const { return getFieldAs<DIScope>(2); }
710 DILocation getOrigLocation() const { return getFieldAs<DILocation>(3); }
711 StringRef getFilename() const { return getScope().getFilename(); }
712 StringRef getDirectory() const { return getScope().getDirectory(); }
714 bool atSameLineAs(const DILocation &Other) const {
715 return (getLineNumber() == Other.getLineNumber() &&
716 getFilename() == Other.getFilename());
718 /// getDiscriminator - DWARF discriminators are used to distinguish
719 /// identical file locations for instructions that are on different
720 /// basic blocks. If two instructions are inside the same lexical block
721 /// and are in different basic blocks, we create a new lexical block
722 /// with identical location as the original but with a different
723 /// discriminator value (lib/Transforms/Util/AddDiscriminators.cpp
725 unsigned getDiscriminator() const {
726 // Since discriminators are associated with lexical blocks, make
727 // sure this location is a lexical block before retrieving its
729 return getScope().isLexicalBlock()
730 ? getFieldAs<DILexicalBlock>(2).getDiscriminator()
733 unsigned computeNewDiscriminator(LLVMContext &Ctx);
734 DILocation copyWithNewScope(LLVMContext &Ctx, DILexicalBlock NewScope);
737 class DIObjCProperty : public DIDescriptor {
738 friend class DIDescriptor;
739 void printInternal(raw_ostream &OS) const;
742 explicit DIObjCProperty(const MDNode *N) : DIDescriptor(N) {}
744 StringRef getObjCPropertyName() const { return getStringField(1); }
745 DIFile getFile() const { return getFieldAs<DIFile>(2); }
746 unsigned getLineNumber() const { return getUnsignedField(3); }
748 StringRef getObjCPropertyGetterName() const { return getStringField(4); }
749 StringRef getObjCPropertySetterName() const { return getStringField(5); }
750 bool isReadOnlyObjCProperty() const {
751 return (getUnsignedField(6) & dwarf::DW_APPLE_PROPERTY_readonly) != 0;
753 bool isReadWriteObjCProperty() const {
754 return (getUnsignedField(6) & dwarf::DW_APPLE_PROPERTY_readwrite) != 0;
756 bool isAssignObjCProperty() const {
757 return (getUnsignedField(6) & dwarf::DW_APPLE_PROPERTY_assign) != 0;
759 bool isRetainObjCProperty() const {
760 return (getUnsignedField(6) & dwarf::DW_APPLE_PROPERTY_retain) != 0;
762 bool isCopyObjCProperty() const {
763 return (getUnsignedField(6) & dwarf::DW_APPLE_PROPERTY_copy) != 0;
765 bool isNonAtomicObjCProperty() const {
766 return (getUnsignedField(6) & dwarf::DW_APPLE_PROPERTY_nonatomic) != 0;
769 DIType getType() const { return getFieldAs<DIType>(7); }
771 /// Verify - Verify that a derived type descriptor is well formed.
775 /// \brief An imported module (C++ using directive or similar).
776 class DIImportedEntity : public DIDescriptor {
777 friend class DIDescriptor;
778 void printInternal(raw_ostream &OS) const;
781 explicit DIImportedEntity(const MDNode *N) : DIDescriptor(N) {}
782 DIScope getContext() const { return getFieldAs<DIScope>(1); }
783 DIDescriptor getEntity() const { return getFieldAs<DIDescriptor>(2); }
784 unsigned getLineNumber() const { return getUnsignedField(3); }
785 StringRef getName() const { return getStringField(4); }
789 /// getDISubprogram - Find subprogram that is enclosing this scope.
790 DISubprogram getDISubprogram(const MDNode *Scope);
792 /// getDICompositeType - Find underlying composite type.
793 DICompositeType getDICompositeType(DIType T);
795 /// getOrInsertFnSpecificMDNode - Return a NameMDNode that is suitable
796 /// to hold function specific information.
797 NamedMDNode *getOrInsertFnSpecificMDNode(Module &M, DISubprogram SP);
799 /// getFnSpecificMDNode - Return a NameMDNode, if available, that is
800 /// suitable to hold function specific information.
801 NamedMDNode *getFnSpecificMDNode(const Module &M, DISubprogram SP);
803 /// createInlinedVariable - Create a new inlined variable based on current
805 /// @param DV Current Variable.
806 /// @param InlinedScope Location at current variable is inlined.
807 DIVariable createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
808 LLVMContext &VMContext);
810 /// cleanseInlinedVariable - Remove inlined scope from the variable.
811 DIVariable cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext);
813 /// Construct DITypeIdentifierMap by going through retained types of each CU.
814 DITypeIdentifierMap generateDITypeIdentifierMap(const NamedMDNode *CU_Nodes);
816 /// Strip debug info in the module if it exists.
817 /// To do this, we remove all calls to the debugger intrinsics and any named
818 /// metadata for debugging. We also remove debug locations for instructions.
819 /// Return true if module is modified.
820 bool StripDebugInfo(Module &M);
822 /// Return Debug Info Metadata Version by checking module flags.
823 unsigned getDebugMetadataVersionFromModule(const Module &M);
825 /// DebugInfoFinder tries to list all debug info MDNodes used in a module. To
826 /// list debug info MDNodes used by an instruction, DebugInfoFinder uses
827 /// processDeclare, processValue and processLocation to handle DbgDeclareInst,
828 /// DbgValueInst and DbgLoc attached to instructions. processModule will go
829 /// through all DICompileUnits in llvm.dbg.cu and list debug info MDNodes
831 class DebugInfoFinder {
833 DebugInfoFinder() : TypeMapInitialized(false) {}
835 /// processModule - Process entire module and collect debug info
837 void processModule(const Module &M);
839 /// processDeclare - Process DbgDeclareInst.
840 void processDeclare(const Module &M, const DbgDeclareInst *DDI);
841 /// Process DbgValueInst.
842 void processValue(const Module &M, const DbgValueInst *DVI);
843 /// processLocation - Process DILocation.
844 void processLocation(const Module &M, DILocation Loc);
850 /// Initialize TypeIdentifierMap.
851 void InitializeTypeMap(const Module &M);
853 /// processType - Process DIType.
854 void processType(DIType DT);
856 /// processLexicalBlock - Process DILexicalBlock.
857 void processLexicalBlock(DILexicalBlock LB);
859 /// processSubprogram - Process DISubprogram.
860 void processSubprogram(DISubprogram SP);
862 void processScope(DIScope Scope);
864 /// addCompileUnit - Add compile unit into CUs.
865 bool addCompileUnit(DICompileUnit CU);
867 /// addGlobalVariable - Add global variable into GVs.
868 bool addGlobalVariable(DIGlobalVariable DIG);
870 // addSubprogram - Add subprogram into SPs.
871 bool addSubprogram(DISubprogram SP);
873 /// addType - Add type into Tys.
874 bool addType(DIType DT);
876 bool addScope(DIScope Scope);
879 typedef SmallVectorImpl<MDNode *>::const_iterator iterator;
880 iterator compile_unit_begin() const { return CUs.begin(); }
881 iterator compile_unit_end() const { return CUs.end(); }
882 iterator subprogram_begin() const { return SPs.begin(); }
883 iterator subprogram_end() const { return SPs.end(); }
884 iterator global_variable_begin() const { return GVs.begin(); }
885 iterator global_variable_end() const { return GVs.end(); }
886 iterator type_begin() const { return TYs.begin(); }
887 iterator type_end() const { return TYs.end(); }
888 iterator scope_begin() const { return Scopes.begin(); }
889 iterator scope_end() const { return Scopes.end(); }
891 unsigned compile_unit_count() const { return CUs.size(); }
892 unsigned global_variable_count() const { return GVs.size(); }
893 unsigned subprogram_count() const { return SPs.size(); }
894 unsigned type_count() const { return TYs.size(); }
895 unsigned scope_count() const { return Scopes.size(); }
898 SmallVector<MDNode *, 8> CUs; // Compile Units
899 SmallVector<MDNode *, 8> SPs; // Subprograms
900 SmallVector<MDNode *, 8> GVs; // Global Variables;
901 SmallVector<MDNode *, 8> TYs; // Types
902 SmallVector<MDNode *, 8> Scopes; // Scopes
903 SmallPtrSet<MDNode *, 64> NodesSeen;
904 DITypeIdentifierMap TypeIdentifierMap;
905 /// Specify if TypeIdentifierMap is initialized.
906 bool TypeMapInitialized;
908 } // end namespace llvm