1 //===--- llvm/Analysis/DebugInfo.h - Debug Information Helpers --*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
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
13 // DWARF information.
14 //
15 //===----------------------------------------------------------------------===//
17 #ifndef LLVM_DEBUGINFO_H
18 #define LLVM_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/Support/Dwarf.h"
26 namespace llvm {
27 class BasicBlock;
28 class Constant;
29 class Function;
30 class GlobalVariable;
31 class Module;
32 class Type;
33 class Value;
34 class DbgDeclareInst;
35 class DbgValueInst;
36 class Instruction;
37 class MDNode;
38 class MDString;
39 class NamedMDNode;
40 class LLVMContext;
41 class raw_ostream;
43 class DIFile;
44 class DISubprogram;
45 class DILexicalBlock;
46 class DILexicalBlockFile;
47 class DIVariable;
48 class DIType;
49 class DIScopeRef;
50 class DIObjCProperty;
52 /// Maps from type identifier to the actual MDNode.
53 typedef DenseMap<const MDString *, MDNode*> DITypeIdentifierMap;
55 /// DIDescriptor - A thin wraper around MDNode to access encoded debug info.
56 /// This should not be stored in a container, because the underlying MDNode
57 /// may change in certain situations.
58 class DIDescriptor {
59 // Befriends DIScopeRef so DIScopeRef can befriend the protected member
60 // function: getFieldAs<DIScopeRef>.
61 friend class DIScopeRef;
62 public:
63 enum {
64 FlagPrivate = 1 << 0,
65 FlagProtected = 1 << 1,
66 FlagFwdDecl = 1 << 2,
67 FlagAppleBlock = 1 << 3,
68 FlagBlockByrefStruct = 1 << 4,
69 FlagVirtual = 1 << 5,
70 FlagArtificial = 1 << 6,
71 FlagExplicit = 1 << 7,
72 FlagPrototyped = 1 << 8,
73 FlagObjcClassComplete = 1 << 9,
74 FlagObjectPointer = 1 << 10,
75 FlagVector = 1 << 11,
76 FlagStaticMember = 1 << 12,
77 FlagIndirectVariable = 1 << 13
78 };
79 protected:
80 const MDNode *DbgNode;
82 StringRef getStringField(unsigned Elt) const;
83 unsigned getUnsignedField(unsigned Elt) const {
84 return (unsigned)getUInt64Field(Elt);
85 }
86 uint64_t getUInt64Field(unsigned Elt) const;
87 int64_t getInt64Field(unsigned Elt) const;
88 DIDescriptor getDescriptorField(unsigned Elt) const;
90 template <typename DescTy>
91 DescTy getFieldAs(unsigned Elt) const {
92 return DescTy(getDescriptorField(Elt));
93 }
95 GlobalVariable *getGlobalVariableField(unsigned Elt) const;
96 Constant *getConstantField(unsigned Elt) const;
97 Function *getFunctionField(unsigned Elt) const;
98 void replaceFunctionField(unsigned Elt, Function *F);
100 public:
101 explicit DIDescriptor(const MDNode *N = 0) : DbgNode(N) {}
103 bool Verify() const;
105 operator MDNode *() const { return const_cast<MDNode*>(DbgNode); }
106 MDNode *operator ->() const { return const_cast<MDNode*>(DbgNode); }
108 // An explicit operator bool so that we can do testing of DI values
109 // easily.
110 // FIXME: This operator bool isn't actually protecting anything at the
111 // moment due to the conversion operator above making DIDescriptor nodes
112 // implicitly convertable to bool.
113 LLVM_EXPLICIT operator bool() const { return DbgNode != 0; }
115 bool operator==(DIDescriptor Other) const {
116 return DbgNode == Other.DbgNode;
117 }
118 bool operator!=(DIDescriptor Other) const {
119 return !operator==(Other);
120 }
122 uint16_t getTag() const {
123 return getUnsignedField(0) & ~LLVMDebugVersionMask;
124 }
126 bool isDerivedType() const;
127 bool isCompositeType() const;
128 bool isBasicType() const;
129 bool isVariable() const;
130 bool isSubprogram() const;
131 bool isGlobalVariable() const;
132 bool isScope() const;
133 bool isFile() const;
134 bool isCompileUnit() const;
135 bool isNameSpace() const;
136 bool isLexicalBlockFile() const;
137 bool isLexicalBlock() const;
138 bool isSubrange() const;
139 bool isEnumerator() const;
140 bool isType() const;
141 bool isUnspecifiedParameter() const;
142 bool isTemplateTypeParameter() const;
143 bool isTemplateValueParameter() const;
144 bool isObjCProperty() const;
145 bool isImportedEntity() const;
147 /// print - print descriptor.
148 void print(raw_ostream &OS) const;
150 /// dump - print descriptor to dbgs() with a newline.
151 void dump() const;
152 };
154 /// npecialize getFieldAs to handle fields that are references to DIScopes.
155 template <>
156 DIScopeRef DIDescriptor::getFieldAs<DIScopeRef>(unsigned Elt) const;
158 /// DISubrange - This is used to represent ranges, for array bounds.
159 class DISubrange : public DIDescriptor {
160 friend class DIDescriptor;
161 void printInternal(raw_ostream &OS) const;
162 public:
163 explicit DISubrange(const MDNode *N = 0) : DIDescriptor(N) {}
165 int64_t getLo() const { return getInt64Field(1); }
166 int64_t getCount() const { return getInt64Field(2); }
167 bool Verify() const;
168 };
170 /// DIArray - This descriptor holds an array of descriptors.
171 class DIArray : public DIDescriptor {
172 public:
173 explicit DIArray(const MDNode *N = 0) : DIDescriptor(N) {}
175 unsigned getNumElements() const;
176 DIDescriptor getElement(unsigned Idx) const {
177 return getDescriptorField(Idx);
178 }
179 };
181 /// DIEnumerator - A wrapper for an enumerator (e.g. X and Y in 'enum {X,Y}').
182 /// FIXME: it seems strange that this doesn't have either a reference to the
183 /// type/precision or a file/line pair for location info.
184 class DIEnumerator : public DIDescriptor {
185 friend class DIDescriptor;
186 void printInternal(raw_ostream &OS) const;
187 public:
188 explicit DIEnumerator(const MDNode *N = 0) : DIDescriptor(N) {}
190 StringRef getName() const { return getStringField(1); }
191 int64_t getEnumValue() const { return getInt64Field(2); }
192 bool Verify() const;
193 };
195 /// DIScope - A base class for various scopes.
196 class DIScope : public DIDescriptor {
197 protected:
198 friend class DIDescriptor;
199 void printInternal(raw_ostream &OS) const;
200 public:
201 explicit DIScope(const MDNode *N = 0) : DIDescriptor (N) {}
203 StringRef getFilename() const;
204 StringRef getDirectory() const;
206 /// Generate a reference to this DIScope. Uses the type identifier instead
207 /// of the actual MDNode if possible, to help type uniquing.
208 Value *generateRef();
209 };
211 /// Represents reference to a DIScope, abstracts over direct and
212 /// identifier-based metadata scope references.
213 class DIScopeRef {
214 template <typename DescTy>
215 friend DescTy DIDescriptor::getFieldAs(unsigned Elt) const;
217 /// Val can be either a MDNode or a MDString, in the latter,
218 /// MDString specifies the type identifier.
219 const Value *Val;
220 explicit DIScopeRef(const Value *V);
221 public:
222 DIScope resolve(const DITypeIdentifierMap &Map) const;
223 operator Value *() const { return const_cast<Value*>(Val); }
224 };
226 /// DIType - This is a wrapper for a type.
227 /// FIXME: Types should be factored much better so that CV qualifiers and
228 /// others do not require a huge and empty descriptor full of zeros.
229 class DIType : public DIScope {
230 protected:
231 friend class DIDescriptor;
232 void printInternal(raw_ostream &OS) const;
234 public:
235 DIType(const MDNode *N = 0) : DIScope(N) {}
237 /// Verify - Verify that a type descriptor is well formed.
238 bool Verify() const;
240 DIScopeRef getContext() const { return getFieldAs<DIScopeRef>(2); }
241 StringRef getName() const { return getStringField(3); }
242 unsigned getLineNumber() const { return getUnsignedField(4); }
243 uint64_t getSizeInBits() const { return getUInt64Field(5); }
244 uint64_t getAlignInBits() const { return getUInt64Field(6); }
245 // FIXME: Offset is only used for DW_TAG_member nodes. Making every type
246 // carry this is just plain insane.
247 uint64_t getOffsetInBits() const { return getUInt64Field(7); }
248 unsigned getFlags() const { return getUnsignedField(8); }
249 bool isPrivate() const {
250 return (getFlags() & FlagPrivate) != 0;
251 }
252 bool isProtected() const {
253 return (getFlags() & FlagProtected) != 0;
254 }
255 bool isForwardDecl() const {
256 return (getFlags() & FlagFwdDecl) != 0;
257 }
258 // isAppleBlock - Return true if this is the Apple Blocks extension.
259 bool isAppleBlockExtension() const {
260 return (getFlags() & FlagAppleBlock) != 0;
261 }
262 bool isBlockByrefStruct() const {
263 return (getFlags() & FlagBlockByrefStruct) != 0;
264 }
265 bool isVirtual() const {
266 return (getFlags() & FlagVirtual) != 0;
267 }
268 bool isArtificial() const {
269 return (getFlags() & FlagArtificial) != 0;
270 }
271 bool isObjectPointer() const {
272 return (getFlags() & FlagObjectPointer) != 0;
273 }
274 bool isObjcClassComplete() const {
275 return (getFlags() & FlagObjcClassComplete) != 0;
276 }
277 bool isVector() const {
278 return (getFlags() & FlagVector) != 0;
279 }
280 bool isStaticMember() const {
281 return (getFlags() & FlagStaticMember) != 0;
282 }
283 bool isValid() const {
284 return DbgNode && isType();
285 }
287 /// isUnsignedDIType - Return true if type encoding is unsigned.
288 bool isUnsignedDIType();
290 /// replaceAllUsesWith - Replace all uses of debug info referenced by
291 /// this descriptor.
292 void replaceAllUsesWith(DIDescriptor &D);
293 void replaceAllUsesWith(MDNode *D);
294 };
296 /// DIBasicType - A basic type, like 'int' or 'float'.
297 class DIBasicType : public DIType {
298 public:
299 explicit DIBasicType(const MDNode *N = 0) : DIType(N) {}
301 unsigned getEncoding() const { return getUnsignedField(9); }
303 /// Verify - Verify that a basic type descriptor is well formed.
304 bool Verify() const;
305 };
307 /// DIDerivedType - A simple derived type, like a const qualified type,
308 /// a typedef, a pointer or reference, et cetera. Or, a data member of
309 /// a class/struct/union.
310 class DIDerivedType : public DIType {
311 friend class DIDescriptor;
312 void printInternal(raw_ostream &OS) const;
314 public:
315 explicit DIDerivedType(const MDNode *N = 0) : DIType(N) {}
317 DIType getTypeDerivedFrom() const { return getFieldAs<DIType>(9); }
319 /// getOriginalTypeSize - If this type is derived from a base type then
320 /// return base type size.
321 uint64_t getOriginalTypeSize() const;
323 /// getObjCProperty - Return property node, if this ivar is
324 /// associated with one.
325 MDNode *getObjCProperty() const;
327 DIScopeRef getClassType() const {
328 assert(getTag() == dwarf::DW_TAG_ptr_to_member_type);
329 return getFieldAs<DIScopeRef>(10);
330 }
332 Constant *getConstant() const {
333 assert((getTag() == dwarf::DW_TAG_member) && isStaticMember());
334 return getConstantField(10);
335 }
337 /// Verify - Verify that a derived type descriptor is well formed.
338 bool Verify() const;
339 };
341 /// DICompositeType - This descriptor holds a type that can refer to multiple
342 /// other types, like a function or struct.
343 /// DICompositeType is derived from DIDerivedType because some
344 /// composite types (such as enums) can be derived from basic types
345 // FIXME: Make this derive from DIType directly & just store the
346 // base type in a single DIType field.
347 class DICompositeType : public DIDerivedType {
348 friend class DIDescriptor;
349 void printInternal(raw_ostream &OS) const;
350 public:
351 explicit DICompositeType(const MDNode *N = 0) : DIDerivedType(N) {}
353 DIArray getTypeArray() const { return getFieldAs<DIArray>(10); }
354 void setTypeArray(DIArray Elements, DIArray TParams = DIArray());
355 void addMember(DIDescriptor D);
356 unsigned getRunTimeLang() const { return getUnsignedField(11); }
357 DIScopeRef getContainingType() const {
358 return getFieldAs<DIScopeRef>(12);
359 }
360 void setContainingType(DICompositeType ContainingType);
361 DIArray getTemplateParams() const { return getFieldAs<DIArray>(13); }
362 MDString *getIdentifier() const;
364 /// Verify - Verify that a composite type descriptor is well formed.
365 bool Verify() const;
366 };
368 /// DIFile - This is a wrapper for a file.
369 class DIFile : public DIScope {
370 friend class DIDescriptor;
371 public:
372 explicit DIFile(const MDNode *N = 0) : DIScope(N) {}
373 MDNode *getFileNode() const;
374 bool Verify() const;
375 };
377 /// DICompileUnit - A wrapper for a compile unit.
378 class DICompileUnit : public DIScope {
379 friend class DIDescriptor;
380 void printInternal(raw_ostream &OS) const;
381 public:
382 explicit DICompileUnit(const MDNode *N = 0) : DIScope(N) {}
384 unsigned getLanguage() const { return getUnsignedField(2); }
385 StringRef getProducer() const { return getStringField(3); }
387 bool isOptimized() const { return getUnsignedField(4) != 0; }
388 StringRef getFlags() const { return getStringField(5); }
389 unsigned getRunTimeVersion() const { return getUnsignedField(6); }
391 DIArray getEnumTypes() const;
392 DIArray getRetainedTypes() const;
393 DIArray getSubprograms() const;
394 DIArray getGlobalVariables() const;
395 DIArray getImportedEntities() const;
397 StringRef getSplitDebugFilename() const { return getStringField(12); }
399 /// Verify - Verify that a compile unit is well formed.
400 bool Verify() const;
401 };
403 /// DISubprogram - This is a wrapper for a subprogram (e.g. a function).
404 class DISubprogram : public DIScope {
405 friend class DIDescriptor;
406 void printInternal(raw_ostream &OS) const;
407 public:
408 explicit DISubprogram(const MDNode *N = 0) : DIScope(N) {}
410 DIScope getContext() const { return getFieldAs<DIScope>(2); }
411 StringRef getName() const { return getStringField(3); }
412 StringRef getDisplayName() const { return getStringField(4); }
413 StringRef getLinkageName() const { return getStringField(5); }
414 unsigned getLineNumber() const { return getUnsignedField(6); }
415 DICompositeType getType() const { return getFieldAs<DICompositeType>(7); }
417 /// isLocalToUnit - Return true if this subprogram is local to the current
418 /// compile unit, like 'static' in C.
419 unsigned isLocalToUnit() const { return getUnsignedField(8); }
420 unsigned isDefinition() const { return getUnsignedField(9); }
422 unsigned getVirtuality() const { return getUnsignedField(10); }
423 unsigned getVirtualIndex() const { return getUnsignedField(11); }
425 DIScopeRef getContainingType() const {
426 return getFieldAs<DIScopeRef>(12);
427 }
429 unsigned getFlags() const {
430 return getUnsignedField(13);
431 }
433 unsigned isArtificial() const {
434 return (getUnsignedField(13) & FlagArtificial) != 0;
435 }
436 /// isPrivate - Return true if this subprogram has "private"
437 /// access specifier.
438 bool isPrivate() const {
439 return (getUnsignedField(13) & FlagPrivate) != 0;
440 }
441 /// isProtected - Return true if this subprogram has "protected"
442 /// access specifier.
443 bool isProtected() const {
444 return (getUnsignedField(13) & FlagProtected) != 0;
445 }
446 /// isExplicit - Return true if this subprogram is marked as explicit.
447 bool isExplicit() const {
448 return (getUnsignedField(13) & FlagExplicit) != 0;
449 }
450 /// isPrototyped - Return true if this subprogram is prototyped.
451 bool isPrototyped() const {
452 return (getUnsignedField(13) & FlagPrototyped) != 0;
453 }
455 unsigned isOptimized() const;
457 /// Verify - Verify that a subprogram descriptor is well formed.
458 bool Verify() const;
460 /// describes - Return true if this subprogram provides debugging
461 /// information for the function F.
462 bool describes(const Function *F);
464 Function *getFunction() const { return getFunctionField(15); }
465 void replaceFunction(Function *F) { replaceFunctionField(15, F); }
466 DIArray getTemplateParams() const { return getFieldAs<DIArray>(16); }
467 DISubprogram getFunctionDeclaration() const {
468 return getFieldAs<DISubprogram>(17);
469 }
470 MDNode *getVariablesNodes() const;
471 DIArray getVariables() const;
473 /// getScopeLineNumber - Get the beginning of the scope of the
474 /// function, not necessarily where the name of the program
475 /// starts.
476 unsigned getScopeLineNumber() const { return getUnsignedField(19); }
477 };
479 /// DILexicalBlock - This is a wrapper for a lexical block.
480 class DILexicalBlock : public DIScope {
481 public:
482 explicit DILexicalBlock(const MDNode *N = 0) : DIScope(N) {}
483 DIScope getContext() const { return getFieldAs<DIScope>(2); }
484 unsigned getLineNumber() const { return getUnsignedField(3); }
485 unsigned getColumnNumber() const { return getUnsignedField(4); }
486 bool Verify() const;
487 };
489 /// DILexicalBlockFile - This is a wrapper for a lexical block with
490 /// a filename change.
491 class DILexicalBlockFile : public DIScope {
492 public:
493 explicit DILexicalBlockFile(const MDNode *N = 0) : DIScope(N) {}
494 DIScope getContext() const {
495 if (getScope().isSubprogram())
496 return getScope();
497 return getScope().getContext();
498 }
499 unsigned getLineNumber() const { return getScope().getLineNumber(); }
500 unsigned getColumnNumber() const { return getScope().getColumnNumber(); }
501 DILexicalBlock getScope() const { return getFieldAs<DILexicalBlock>(2); }
502 bool Verify() const;
503 };
505 /// DINameSpace - A wrapper for a C++ style name space.
506 class DINameSpace : public DIScope {
507 friend class DIDescriptor;
508 void printInternal(raw_ostream &OS) const;
509 public:
510 explicit DINameSpace(const MDNode *N = 0) : DIScope(N) {}
511 DIScope getContext() const { return getFieldAs<DIScope>(2); }
512 StringRef getName() const { return getStringField(3); }
513 unsigned getLineNumber() const { return getUnsignedField(4); }
514 bool Verify() const;
515 };
517 /// DITemplateTypeParameter - This is a wrapper for template type parameter.
518 class DITemplateTypeParameter : public DIDescriptor {
519 public:
520 explicit DITemplateTypeParameter(const MDNode *N = 0) : DIDescriptor(N) {}
522 DIScope getContext() const { return getFieldAs<DIScope>(1); }
523 StringRef getName() const { return getStringField(2); }
524 DIType getType() const { return getFieldAs<DIType>(3); }
525 StringRef getFilename() const {
526 return getFieldAs<DIFile>(4).getFilename();
527 }
528 StringRef getDirectory() const {
529 return getFieldAs<DIFile>(4).getDirectory();
530 }
531 unsigned getLineNumber() const { return getUnsignedField(5); }
532 unsigned getColumnNumber() const { return getUnsignedField(6); }
533 bool Verify() const;
534 };
536 /// DITemplateValueParameter - This is a wrapper for template value parameter.
537 class DITemplateValueParameter : public DIDescriptor {
538 public:
539 explicit DITemplateValueParameter(const MDNode *N = 0) : DIDescriptor(N) {}
541 DIScope getContext() const { return getFieldAs<DIScope>(1); }
542 StringRef getName() const { return getStringField(2); }
543 DIType getType() const { return getFieldAs<DIType>(3); }
544 Value *getValue() const;
545 StringRef getFilename() const {
546 return getFieldAs<DIFile>(5).getFilename();
547 }
548 StringRef getDirectory() const {
549 return getFieldAs<DIFile>(5).getDirectory();
550 }
551 unsigned getLineNumber() const { return getUnsignedField(6); }
552 unsigned getColumnNumber() const { return getUnsignedField(7); }
553 bool Verify() const;
554 };
556 /// DIGlobalVariable - This is a wrapper for a global variable.
557 class DIGlobalVariable : public DIDescriptor {
558 friend class DIDescriptor;
559 void printInternal(raw_ostream &OS) const;
560 public:
561 explicit DIGlobalVariable(const MDNode *N = 0) : DIDescriptor(N) {}
563 DIScope getContext() const { return getFieldAs<DIScope>(2); }
564 StringRef getName() const { return getStringField(3); }
565 StringRef getDisplayName() const { return getStringField(4); }
566 StringRef getLinkageName() const { return getStringField(5); }
567 StringRef getFilename() const {
568 return getFieldAs<DIFile>(6).getFilename();
569 }
570 StringRef getDirectory() const {
571 return getFieldAs<DIFile>(6).getDirectory();
573 }
575 unsigned getLineNumber() const { return getUnsignedField(7); }
576 DIType getType() const { return getFieldAs<DIType>(8); }
577 unsigned isLocalToUnit() const { return getUnsignedField(9); }
578 unsigned isDefinition() const { return getUnsignedField(10); }
580 GlobalVariable *getGlobal() const { return getGlobalVariableField(11); }
581 Constant *getConstant() const { return getConstantField(11); }
582 DIDerivedType getStaticDataMemberDeclaration() const {
583 return getFieldAs<DIDerivedType>(12);
584 }
586 /// Verify - Verify that a global variable descriptor is well formed.
587 bool Verify() const;
588 };
590 /// DIVariable - This is a wrapper for a variable (e.g. parameter, local,
591 /// global etc).
592 class DIVariable : public DIDescriptor {
593 friend class DIDescriptor;
594 void printInternal(raw_ostream &OS) const;
595 public:
596 explicit DIVariable(const MDNode *N = 0) : DIDescriptor(N) {}
598 DIScope getContext() const { return getFieldAs<DIScope>(1); }
599 StringRef getName() const { return getStringField(2); }
600 DIFile getFile() const { return getFieldAs<DIFile>(3); }
601 unsigned getLineNumber() const {
602 return (getUnsignedField(4) << 8) >> 8;
603 }
604 unsigned getArgNumber() const {
605 unsigned L = getUnsignedField(4);
606 return L >> 24;
607 }
608 DIType getType() const { return getFieldAs<DIType>(5); }
610 /// isArtificial - Return true if this variable is marked as "artificial".
611 bool isArtificial() const {
612 return (getUnsignedField(6) & FlagArtificial) != 0;
613 }
615 bool isObjectPointer() const {
616 return (getUnsignedField(6) & FlagObjectPointer) != 0;
617 }
619 /// \brief Return true if this variable is represented as a pointer.
620 bool isIndirect() const {
621 return (getUnsignedField(6) & FlagIndirectVariable) != 0;
622 }
624 /// getInlinedAt - If this variable is inlined then return inline location.
625 MDNode *getInlinedAt() const;
627 /// Verify - Verify that a variable descriptor is well formed.
628 bool Verify() const;
630 /// HasComplexAddr - Return true if the variable has a complex address.
631 bool hasComplexAddress() const {
632 return getNumAddrElements() > 0;
633 }
635 unsigned getNumAddrElements() const;
637 uint64_t getAddrElement(unsigned Idx) const {
638 return getUInt64Field(Idx+8);
639 }
641 /// isBlockByrefVariable - Return true if the variable was declared as
642 /// a "__block" variable (Apple Blocks).
643 bool isBlockByrefVariable() const {
644 return getType().isBlockByrefStruct();
645 }
647 /// isInlinedFnArgument - Return true if this variable provides debugging
648 /// information for an inlined function arguments.
649 bool isInlinedFnArgument(const Function *CurFn);
651 void printExtendedName(raw_ostream &OS) const;
652 };
654 /// DILocation - This object holds location information. This object
655 /// is not associated with any DWARF tag.
656 class DILocation : public DIDescriptor {
657 public:
658 explicit DILocation(const MDNode *N) : DIDescriptor(N) { }
660 unsigned getLineNumber() const { return getUnsignedField(0); }
661 unsigned getColumnNumber() const { return getUnsignedField(1); }
662 DIScope getScope() const { return getFieldAs<DIScope>(2); }
663 DILocation getOrigLocation() const { return getFieldAs<DILocation>(3); }
664 StringRef getFilename() const { return getScope().getFilename(); }
665 StringRef getDirectory() const { return getScope().getDirectory(); }
666 bool Verify() const;
667 };
669 class DIObjCProperty : public DIDescriptor {
670 friend class DIDescriptor;
671 void printInternal(raw_ostream &OS) const;
672 public:
673 explicit DIObjCProperty(const MDNode *N) : DIDescriptor(N) { }
675 StringRef getObjCPropertyName() const { return getStringField(1); }
676 DIFile getFile() const { return getFieldAs<DIFile>(2); }
677 unsigned getLineNumber() const { return getUnsignedField(3); }
679 StringRef getObjCPropertyGetterName() const {
680 return getStringField(4);
681 }
682 StringRef getObjCPropertySetterName() const {
683 return getStringField(5);
684 }
685 bool isReadOnlyObjCProperty() const {
686 return (getUnsignedField(6) & dwarf::DW_APPLE_PROPERTY_readonly) != 0;
687 }
688 bool isReadWriteObjCProperty() const {
689 return (getUnsignedField(6) & dwarf::DW_APPLE_PROPERTY_readwrite) != 0;
690 }
691 bool isAssignObjCProperty() const {
692 return (getUnsignedField(6) & dwarf::DW_APPLE_PROPERTY_assign) != 0;
693 }
694 bool isRetainObjCProperty() const {
695 return (getUnsignedField(6) & dwarf::DW_APPLE_PROPERTY_retain) != 0;
696 }
697 bool isCopyObjCProperty() const {
698 return (getUnsignedField(6) & dwarf::DW_APPLE_PROPERTY_copy) != 0;
699 }
700 bool isNonAtomicObjCProperty() const {
701 return (getUnsignedField(6) & dwarf::DW_APPLE_PROPERTY_nonatomic) != 0;
702 }
704 DIType getType() const { return getFieldAs<DIType>(7); }
706 /// Verify - Verify that a derived type descriptor is well formed.
707 bool Verify() const;
708 };
710 /// \brief An imported module (C++ using directive or similar).
711 class DIImportedEntity : public DIDescriptor {
712 friend class DIDescriptor;
713 void printInternal(raw_ostream &OS) const;
714 public:
715 explicit DIImportedEntity(const MDNode *N) : DIDescriptor(N) { }
716 DIScope getContext() const { return getFieldAs<DIScope>(1); }
717 DIDescriptor getEntity() const { return getFieldAs<DIDescriptor>(2); }
718 unsigned getLineNumber() const { return getUnsignedField(3); }
719 StringRef getName() const { return getStringField(4); }
720 bool Verify() const;
721 };
723 /// getDISubprogram - Find subprogram that is enclosing this scope.
724 DISubprogram getDISubprogram(const MDNode *Scope);
726 /// getDICompositeType - Find underlying composite type.
727 DICompositeType getDICompositeType(DIType T);
729 /// getOrInsertFnSpecificMDNode - Return a NameMDNode that is suitable
730 /// to hold function specific information.
731 NamedMDNode *getOrInsertFnSpecificMDNode(Module &M, DISubprogram SP);
733 /// getFnSpecificMDNode - Return a NameMDNode, if available, that is
734 /// suitable to hold function specific information.
735 NamedMDNode *getFnSpecificMDNode(const Module &M, DISubprogram SP);
737 /// createInlinedVariable - Create a new inlined variable based on current
738 /// variable.
739 /// @param DV Current Variable.
740 /// @param InlinedScope Location at current variable is inlined.
741 DIVariable createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
742 LLVMContext &VMContext);
744 /// cleanseInlinedVariable - Remove inlined scope from the variable.
745 DIVariable cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext);
747 /// Construct DITypeIdentifierMap by going through retained types of each CU.
748 DITypeIdentifierMap generateDITypeIdentifierMap(const NamedMDNode *CU_Nodes);
750 /// DebugInfoFinder tries to list all debug info MDNodes used in a module. To
751 /// list debug info MDNodes used by an instruction, DebugInfoFinder uses
752 /// processDeclare, processValue and processLocation to handle DbgDeclareInst,
753 /// DbgValueInst and DbgLoc attached to instructions. processModule will go
754 /// through all DICompileUnits in llvm.dbg.cu and list debug info MDNodes
755 /// used by the CUs.
756 class DebugInfoFinder {
757 public:
758 /// processModule - Process entire module and collect debug info
759 /// anchors.
760 void processModule(const Module &M);
762 /// processDeclare - Process DbgDeclareInst.
763 void processDeclare(const DbgDeclareInst *DDI);
764 /// Process DbgValueInst.
765 void processValue(const DbgValueInst *DVI);
766 /// processLocation - Process DILocation.
767 void processLocation(DILocation Loc);
769 /// Clear all lists.
770 void reset();
771 private:
772 /// processType - Process DIType.
773 void processType(DIType DT);
775 /// processLexicalBlock - Process DILexicalBlock.
776 void processLexicalBlock(DILexicalBlock LB);
778 /// processSubprogram - Process DISubprogram.
779 void processSubprogram(DISubprogram SP);
781 void processScope(DIScope Scope);
783 /// addCompileUnit - Add compile unit into CUs.
784 bool addCompileUnit(DICompileUnit CU);
786 /// addGlobalVariable - Add global variable into GVs.
787 bool addGlobalVariable(DIGlobalVariable DIG);
789 // addSubprogram - Add subprogram into SPs.
790 bool addSubprogram(DISubprogram SP);
792 /// addType - Add type into Tys.
793 bool addType(DIType DT);
795 bool addScope(DIScope Scope);
797 public:
798 typedef SmallVectorImpl<MDNode *>::const_iterator iterator;
799 iterator compile_unit_begin() const { return CUs.begin(); }
800 iterator compile_unit_end() const { return CUs.end(); }
801 iterator subprogram_begin() const { return SPs.begin(); }
802 iterator subprogram_end() const { return SPs.end(); }
803 iterator global_variable_begin() const { return GVs.begin(); }
804 iterator global_variable_end() const { return GVs.end(); }
805 iterator type_begin() const { return TYs.begin(); }
806 iterator type_end() const { return TYs.end(); }
807 iterator scope_begin() const { return Scopes.begin(); }
808 iterator scope_end() const { return Scopes.end(); }
810 unsigned compile_unit_count() const { return CUs.size(); }
811 unsigned global_variable_count() const { return GVs.size(); }
812 unsigned subprogram_count() const { return SPs.size(); }
813 unsigned type_count() const { return TYs.size(); }
814 unsigned scope_count() const { return Scopes.size(); }
816 private:
817 SmallVector<MDNode *, 8> CUs; // Compile Units
818 SmallVector<MDNode *, 8> SPs; // Subprograms
819 SmallVector<MDNode *, 8> GVs; // Global Variables;
820 SmallVector<MDNode *, 8> TYs; // Types
821 SmallVector<MDNode *, 8> Scopes; // Scopes
822 SmallPtrSet<MDNode *, 64> NodesSeen;
823 DITypeIdentifierMap TypeIdentifierMap;
824 };
825 } // end namespace llvm
827 #endif