1 //===--- DebugInfo.cpp - Debug Information Helper Classes -----------------===//
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 implements the helper classes used to build and interpret debug
11 // information in LLVM IR form.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/DebugInfo.h"
16 #include "llvm/ADT/STLExtras.h"
17 #include "llvm/ADT/SmallPtrSet.h"
18 #include "llvm/ADT/SmallString.h"
19 #include "llvm/Analysis/ValueTracking.h"
20 #include "llvm/IR/Constants.h"
21 #include "llvm/IR/DerivedTypes.h"
22 #include "llvm/IR/Instructions.h"
23 #include "llvm/IR/IntrinsicInst.h"
24 #include "llvm/IR/Intrinsics.h"
25 #include "llvm/IR/Module.h"
26 #include "llvm/Support/Debug.h"
27 #include "llvm/Support/Dwarf.h"
28 #include "llvm/Support/ValueHandle.h"
29 #include "llvm/Support/raw_ostream.h"
31 using namespace llvm::dwarf;
33 //===----------------------------------------------------------------------===//
35 //===----------------------------------------------------------------------===//
37 DIDescriptor::DIDescriptor(const DIFile F) : DbgNode(F.DbgNode) {
40 DIDescriptor::DIDescriptor(const DISubprogram F) : DbgNode(F.DbgNode) {
43 DIDescriptor::DIDescriptor(const DILexicalBlockFile F) : DbgNode(F.DbgNode) {
46 DIDescriptor::DIDescriptor(const DILexicalBlock F) : DbgNode(F.DbgNode) {
49 DIDescriptor::DIDescriptor(const DIVariable F) : DbgNode(F.DbgNode) {
52 DIDescriptor::DIDescriptor(const DIType F) : DbgNode(F.DbgNode) {
55 bool DIDescriptor::Verify() const {
57 (DIDerivedType(DbgNode).Verify() ||
58 DICompositeType(DbgNode).Verify() || DIBasicType(DbgNode).Verify() ||
59 DIVariable(DbgNode).Verify() || DISubprogram(DbgNode).Verify() ||
60 DIGlobalVariable(DbgNode).Verify() || DIFile(DbgNode).Verify() ||
61 DICompileUnit(DbgNode).Verify() || DINameSpace(DbgNode).Verify() ||
62 DILexicalBlock(DbgNode).Verify() ||
63 DILexicalBlockFile(DbgNode).Verify() ||
64 DISubrange(DbgNode).Verify() || DIEnumerator(DbgNode).Verify() ||
65 DIObjCProperty(DbgNode).Verify() ||
66 DITemplateTypeParameter(DbgNode).Verify() ||
67 DITemplateValueParameter(DbgNode).Verify() ||
68 DIImportedEntity(DbgNode).Verify());
71 static Value *getField(const MDNode *DbgNode, unsigned Elt) {
72 if (DbgNode == 0 || Elt >= DbgNode->getNumOperands())
74 return DbgNode->getOperand(Elt);
77 static MDNode *getNodeField(const MDNode *DbgNode, unsigned Elt) {
78 return dyn_cast_or_null<MDNode>(getField(DbgNode, Elt));
81 static StringRef getStringField(const MDNode *DbgNode, unsigned Elt) {
82 if (MDString *MDS = dyn_cast_or_null<MDString>(getField(DbgNode, Elt)))
83 return MDS->getString();
87 StringRef DIDescriptor::getStringField(unsigned Elt) const {
88 return ::getStringField(DbgNode, Elt);
91 uint64_t DIDescriptor::getUInt64Field(unsigned Elt) const {
95 if (Elt < DbgNode->getNumOperands())
97 = dyn_cast_or_null<ConstantInt>(DbgNode->getOperand(Elt)))
98 return CI->getZExtValue();
103 int64_t DIDescriptor::getInt64Field(unsigned Elt) const {
107 if (Elt < DbgNode->getNumOperands())
109 = dyn_cast_or_null<ConstantInt>(DbgNode->getOperand(Elt)))
110 return CI->getSExtValue();
115 DIDescriptor DIDescriptor::getDescriptorField(unsigned Elt) const {
116 MDNode *Field = getNodeField(DbgNode, Elt);
117 return DIDescriptor(Field);
120 GlobalVariable *DIDescriptor::getGlobalVariableField(unsigned Elt) const {
124 if (Elt < DbgNode->getNumOperands())
125 return dyn_cast_or_null<GlobalVariable>(DbgNode->getOperand(Elt));
129 Constant *DIDescriptor::getConstantField(unsigned Elt) const {
133 if (Elt < DbgNode->getNumOperands())
134 return dyn_cast_or_null<Constant>(DbgNode->getOperand(Elt));
138 Function *DIDescriptor::getFunctionField(unsigned Elt) const {
142 if (Elt < DbgNode->getNumOperands())
143 return dyn_cast_or_null<Function>(DbgNode->getOperand(Elt));
147 void DIDescriptor::replaceFunctionField(unsigned Elt, Function *F) {
151 if (Elt < DbgNode->getNumOperands()) {
152 MDNode *Node = const_cast<MDNode*>(DbgNode);
153 Node->replaceOperandWith(Elt, F);
157 unsigned DIVariable::getNumAddrElements() const {
158 return DbgNode->getNumOperands()-8;
161 /// getInlinedAt - If this variable is inlined then return inline location.
162 MDNode *DIVariable::getInlinedAt() const {
163 return getNodeField(DbgNode, 7);
166 //===----------------------------------------------------------------------===//
168 //===----------------------------------------------------------------------===//
170 /// isBasicType - Return true if the specified tag is legal for
172 bool DIDescriptor::isBasicType() const {
173 if (!DbgNode) return false;
175 case dwarf::DW_TAG_base_type:
176 case dwarf::DW_TAG_unspecified_type:
183 /// isDerivedType - Return true if the specified tag is legal for DIDerivedType.
184 bool DIDescriptor::isDerivedType() const {
185 if (!DbgNode) return false;
187 case dwarf::DW_TAG_typedef:
188 case dwarf::DW_TAG_pointer_type:
189 case dwarf::DW_TAG_ptr_to_member_type:
190 case dwarf::DW_TAG_reference_type:
191 case dwarf::DW_TAG_rvalue_reference_type:
192 case dwarf::DW_TAG_const_type:
193 case dwarf::DW_TAG_volatile_type:
194 case dwarf::DW_TAG_restrict_type:
195 case dwarf::DW_TAG_member:
196 case dwarf::DW_TAG_inheritance:
197 case dwarf::DW_TAG_friend:
200 // CompositeTypes are currently modelled as DerivedTypes.
201 return isCompositeType();
205 /// isCompositeType - Return true if the specified tag is legal for
207 bool DIDescriptor::isCompositeType() const {
208 if (!DbgNode) return false;
210 case dwarf::DW_TAG_array_type:
211 case dwarf::DW_TAG_structure_type:
212 case dwarf::DW_TAG_union_type:
213 case dwarf::DW_TAG_enumeration_type:
214 case dwarf::DW_TAG_subroutine_type:
215 case dwarf::DW_TAG_class_type:
222 /// isVariable - Return true if the specified tag is legal for DIVariable.
223 bool DIDescriptor::isVariable() const {
224 if (!DbgNode) return false;
226 case dwarf::DW_TAG_auto_variable:
227 case dwarf::DW_TAG_arg_variable:
234 /// isType - Return true if the specified tag is legal for DIType.
235 bool DIDescriptor::isType() const {
236 return isBasicType() || isCompositeType() || isDerivedType();
239 /// isSubprogram - Return true if the specified tag is legal for
241 bool DIDescriptor::isSubprogram() const {
242 return DbgNode && getTag() == dwarf::DW_TAG_subprogram;
245 /// isGlobalVariable - Return true if the specified tag is legal for
246 /// DIGlobalVariable.
247 bool DIDescriptor::isGlobalVariable() const {
248 return DbgNode && (getTag() == dwarf::DW_TAG_variable ||
249 getTag() == dwarf::DW_TAG_constant);
252 /// isGlobal - Return true if the specified tag is legal for DIGlobal.
253 bool DIDescriptor::isGlobal() const {
254 return isGlobalVariable();
257 /// isUnspecifiedParmeter - Return true if the specified tag is
258 /// DW_TAG_unspecified_parameters.
259 bool DIDescriptor::isUnspecifiedParameter() const {
260 return DbgNode && getTag() == dwarf::DW_TAG_unspecified_parameters;
263 /// isScope - Return true if the specified tag is one of the scope
265 bool DIDescriptor::isScope() const {
266 if (!DbgNode) return false;
268 case dwarf::DW_TAG_compile_unit:
269 case dwarf::DW_TAG_lexical_block:
270 case dwarf::DW_TAG_subprogram:
271 case dwarf::DW_TAG_namespace:
279 /// isTemplateTypeParameter - Return true if the specified tag is
280 /// DW_TAG_template_type_parameter.
281 bool DIDescriptor::isTemplateTypeParameter() const {
282 return DbgNode && getTag() == dwarf::DW_TAG_template_type_parameter;
285 /// isTemplateValueParameter - Return true if the specified tag is
286 /// DW_TAG_template_value_parameter.
287 bool DIDescriptor::isTemplateValueParameter() const {
288 return DbgNode && (getTag() == dwarf::DW_TAG_template_value_parameter ||
289 getTag() == dwarf::DW_TAG_GNU_template_template_param ||
290 getTag() == dwarf::DW_TAG_GNU_template_parameter_pack);
293 /// isCompileUnit - Return true if the specified tag is DW_TAG_compile_unit.
294 bool DIDescriptor::isCompileUnit() const {
295 return DbgNode && getTag() == dwarf::DW_TAG_compile_unit;
298 /// isFile - Return true if the specified tag is DW_TAG_file_type.
299 bool DIDescriptor::isFile() const {
300 return DbgNode && getTag() == dwarf::DW_TAG_file_type;
303 /// isNameSpace - Return true if the specified tag is DW_TAG_namespace.
304 bool DIDescriptor::isNameSpace() const {
305 return DbgNode && getTag() == dwarf::DW_TAG_namespace;
308 /// isLexicalBlockFile - Return true if the specified descriptor is a
309 /// lexical block with an extra file.
310 bool DIDescriptor::isLexicalBlockFile() const {
311 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
312 (DbgNode->getNumOperands() == 3);
315 /// isLexicalBlock - Return true if the specified tag is DW_TAG_lexical_block.
316 bool DIDescriptor::isLexicalBlock() const {
317 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
318 (DbgNode->getNumOperands() > 3);
321 /// isSubrange - Return true if the specified tag is DW_TAG_subrange_type.
322 bool DIDescriptor::isSubrange() const {
323 return DbgNode && getTag() == dwarf::DW_TAG_subrange_type;
326 /// isEnumerator - Return true if the specified tag is DW_TAG_enumerator.
327 bool DIDescriptor::isEnumerator() const {
328 return DbgNode && getTag() == dwarf::DW_TAG_enumerator;
331 /// isObjCProperty - Return true if the specified tag is DW_TAG_APPLE_property.
332 bool DIDescriptor::isObjCProperty() const {
333 return DbgNode && getTag() == dwarf::DW_TAG_APPLE_property;
336 /// \brief Return true if the specified tag is DW_TAG_imported_module or
337 /// DW_TAG_imported_declaration.
338 bool DIDescriptor::isImportedEntity() const {
339 return DbgNode && (getTag() == dwarf::DW_TAG_imported_module ||
340 getTag() == dwarf::DW_TAG_imported_declaration);
343 //===----------------------------------------------------------------------===//
344 // Simple Descriptor Constructors and other Methods
345 //===----------------------------------------------------------------------===//
347 DIType::DIType(const MDNode *N) : DIScope(N) {
353 unsigned DIArray::getNumElements() const {
356 return DbgNode->getNumOperands();
359 /// replaceAllUsesWith - Replace all uses of debug info referenced by
361 void DIType::replaceAllUsesWith(DIDescriptor &D) {
365 // Since we use a TrackingVH for the node, its easy for clients to manufacture
366 // legitimate situations where they want to replaceAllUsesWith() on something
367 // which, due to uniquing, has merged with the source. We shield clients from
368 // this detail by allowing a value to be replaced with replaceAllUsesWith()
371 MDNode *Node = const_cast<MDNode*>(DbgNode);
372 const MDNode *DN = D;
373 const Value *V = cast_or_null<Value>(DN);
374 Node->replaceAllUsesWith(const_cast<Value*>(V));
375 MDNode::deleteTemporary(Node);
379 /// replaceAllUsesWith - Replace all uses of debug info referenced by
381 void DIType::replaceAllUsesWith(MDNode *D) {
385 // Since we use a TrackingVH for the node, its easy for clients to manufacture
386 // legitimate situations where they want to replaceAllUsesWith() on something
387 // which, due to uniquing, has merged with the source. We shield clients from
388 // this detail by allowing a value to be replaced with replaceAllUsesWith()
391 MDNode *Node = const_cast<MDNode*>(DbgNode);
392 const MDNode *DN = D;
393 const Value *V = cast_or_null<Value>(DN);
394 Node->replaceAllUsesWith(const_cast<Value*>(V));
395 MDNode::deleteTemporary(Node);
399 /// isUnsignedDIType - Return true if type encoding is unsigned.
400 bool DIType::isUnsignedDIType() {
401 DIDerivedType DTy(DbgNode);
403 return DTy.getTypeDerivedFrom().isUnsignedDIType();
405 DIBasicType BTy(DbgNode);
407 unsigned Encoding = BTy.getEncoding();
408 if (Encoding == dwarf::DW_ATE_unsigned ||
409 Encoding == dwarf::DW_ATE_unsigned_char ||
410 Encoding == dwarf::DW_ATE_boolean)
416 /// Verify - Verify that a compile unit is well formed.
417 bool DICompileUnit::Verify() const {
418 if (!isCompileUnit())
420 StringRef N = getFilename();
423 // It is possible that directory and produce string is empty.
424 return DbgNode->getNumOperands() == 13;
427 /// Verify - Verify that an ObjC property is well formed.
428 bool DIObjCProperty::Verify() const {
429 if (!isObjCProperty())
432 // Don't worry about the rest of the strings for now.
433 return DbgNode->getNumOperands() == 8;
436 /// Verify - Verify that a type descriptor is well formed.
437 bool DIType::Verify() const {
440 unsigned Tag = getTag();
441 if (!isBasicType() && Tag != dwarf::DW_TAG_const_type &&
442 Tag != dwarf::DW_TAG_volatile_type && Tag != dwarf::DW_TAG_pointer_type &&
443 Tag != dwarf::DW_TAG_ptr_to_member_type &&
444 Tag != dwarf::DW_TAG_reference_type &&
445 Tag != dwarf::DW_TAG_rvalue_reference_type &&
446 Tag != dwarf::DW_TAG_restrict_type &&
447 Tag != dwarf::DW_TAG_array_type &&
448 Tag != dwarf::DW_TAG_enumeration_type &&
449 Tag != dwarf::DW_TAG_subroutine_type &&
450 Tag != dwarf::DW_TAG_inheritance &&
451 Tag != dwarf::DW_TAG_friend &&
452 getFilename().empty())
454 // DIType is abstract, it should be a BasicType, a DerivedType or
457 DIBasicType(DbgNode).Verify();
458 else if (isCompositeType())
459 DICompositeType(DbgNode).Verify();
460 else if (isDerivedType())
461 DIDerivedType(DbgNode).Verify();
467 /// Verify - Verify that a basic type descriptor is well formed.
468 bool DIBasicType::Verify() const {
469 return isBasicType() && DbgNode->getNumOperands() == 10;
472 /// Verify - Verify that a derived type descriptor is well formed.
473 bool DIDerivedType::Verify() const {
474 return isDerivedType() && DbgNode->getNumOperands() >= 10 &&
475 DbgNode->getNumOperands() <= 14;
478 /// Verify - Verify that a composite type descriptor is well formed.
479 bool DICompositeType::Verify() const {
480 if (!isCompositeType())
483 return DbgNode->getNumOperands() >= 10 && DbgNode->getNumOperands() <= 14;
486 /// Verify - Verify that a subprogram descriptor is well formed.
487 bool DISubprogram::Verify() const {
491 return DbgNode->getNumOperands() == 20;
494 /// Verify - Verify that a global variable descriptor is well formed.
495 bool DIGlobalVariable::Verify() const {
496 if (!isGlobalVariable())
499 if (getDisplayName().empty())
502 return DbgNode->getNumOperands() == 13;
505 /// Verify - Verify that a variable descriptor is well formed.
506 bool DIVariable::Verify() const {
510 return DbgNode->getNumOperands() >= 8;
513 /// Verify - Verify that a location descriptor is well formed.
514 bool DILocation::Verify() const {
518 return DbgNode->getNumOperands() == 4;
521 /// Verify - Verify that a namespace descriptor is well formed.
522 bool DINameSpace::Verify() const {
525 return DbgNode->getNumOperands() == 5;
528 /// \brief Retrieve the MDNode for the directory/file pair.
529 MDNode *DIFile::getFileNode() const {
530 return getNodeField(DbgNode, 1);
533 /// \brief Verify that the file descriptor is well formed.
534 bool DIFile::Verify() const {
535 return isFile() && DbgNode->getNumOperands() == 2;
538 /// \brief Verify that the enumerator descriptor is well formed.
539 bool DIEnumerator::Verify() const {
540 return isEnumerator() && DbgNode->getNumOperands() == 3;
543 /// \brief Verify that the subrange descriptor is well formed.
544 bool DISubrange::Verify() const {
545 return isSubrange() && DbgNode->getNumOperands() == 3;
548 /// \brief Verify that the lexical block descriptor is well formed.
549 bool DILexicalBlock::Verify() const {
550 return isLexicalBlock() && DbgNode->getNumOperands() == 6;
553 /// \brief Verify that the file-scoped lexical block descriptor is well formed.
554 bool DILexicalBlockFile::Verify() const {
555 return isLexicalBlockFile() && DbgNode->getNumOperands() == 3;
558 /// \brief Verify that the template type parameter descriptor is well formed.
559 bool DITemplateTypeParameter::Verify() const {
560 return isTemplateTypeParameter() && DbgNode->getNumOperands() == 7;
563 /// \brief Verify that the template value parameter descriptor is well formed.
564 bool DITemplateValueParameter::Verify() const {
565 return isTemplateValueParameter() && DbgNode->getNumOperands() == 8;
568 /// \brief Verify that the imported module descriptor is well formed.
569 bool DIImportedEntity::Verify() const {
570 return isImportedEntity() &&
571 (DbgNode->getNumOperands() == 4 || DbgNode->getNumOperands() == 5);
574 /// getOriginalTypeSize - If this type is derived from a base type then
575 /// return base type size.
576 uint64_t DIDerivedType::getOriginalTypeSize() const {
577 unsigned Tag = getTag();
579 if (Tag != dwarf::DW_TAG_member && Tag != dwarf::DW_TAG_typedef &&
580 Tag != dwarf::DW_TAG_const_type && Tag != dwarf::DW_TAG_volatile_type &&
581 Tag != dwarf::DW_TAG_restrict_type)
582 return getSizeInBits();
584 DIType BaseType = getTypeDerivedFrom();
586 // If this type is not derived from any type then take conservative approach.
587 if (!BaseType.isValid())
588 return getSizeInBits();
590 // If this is a derived type, go ahead and get the base type, unless it's a
591 // reference then it's just the size of the field. Pointer types have no need
592 // of this since they're a different type of qualification on the type.
593 if (BaseType.getTag() == dwarf::DW_TAG_reference_type ||
594 BaseType.getTag() == dwarf::DW_TAG_rvalue_reference_type)
595 return getSizeInBits();
597 if (BaseType.isDerivedType())
598 return DIDerivedType(BaseType).getOriginalTypeSize();
600 return BaseType.getSizeInBits();
603 /// getObjCProperty - Return property node, if this ivar is associated with one.
604 MDNode *DIDerivedType::getObjCProperty() const {
605 return getNodeField(DbgNode, 10);
608 /// \brief Set the array of member DITypes.
609 void DICompositeType::setTypeArray(DIArray Elements, DIArray TParams) {
610 assert((!TParams || DbgNode->getNumOperands() == 14) &&
611 "If you're setting the template parameters this should include a slot "
613 TrackingVH<MDNode> N(*this);
614 N->replaceOperandWith(10, Elements);
616 N->replaceOperandWith(13, TParams);
620 /// \brief Set the containing type.
621 void DICompositeType::setContainingType(DICompositeType ContainingType) {
622 TrackingVH<MDNode> N(*this);
623 N->replaceOperandWith(12, ContainingType);
627 /// isInlinedFnArgument - Return true if this variable provides debugging
628 /// information for an inlined function arguments.
629 bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
630 assert(CurFn && "Invalid function");
631 if (!getContext().isSubprogram())
633 // This variable is not inlined function argument if its scope
634 // does not describe current function.
635 return !DISubprogram(getContext()).describes(CurFn);
638 /// describes - Return true if this subprogram provides debugging
639 /// information for the function F.
640 bool DISubprogram::describes(const Function *F) {
641 assert(F && "Invalid function");
642 if (F == getFunction())
644 StringRef Name = getLinkageName();
647 if (F->getName() == Name)
652 unsigned DISubprogram::isOptimized() const {
653 assert (DbgNode && "Invalid subprogram descriptor!");
654 if (DbgNode->getNumOperands() == 15)
655 return getUnsignedField(14);
659 MDNode *DISubprogram::getVariablesNodes() const {
660 return getNodeField(DbgNode, 18);
663 DIArray DISubprogram::getVariables() const {
664 return DIArray(getNodeField(DbgNode, 18));
667 Value *DITemplateValueParameter::getValue() const {
668 return getField(DbgNode, 4);
671 StringRef DIScope::getFilename() const {
674 return ::getStringField(getNodeField(DbgNode, 1), 0);
677 StringRef DIScope::getDirectory() const {
680 return ::getStringField(getNodeField(DbgNode, 1), 1);
683 DIArray DICompileUnit::getEnumTypes() const {
684 if (!DbgNode || DbgNode->getNumOperands() < 13)
687 return DIArray(getNodeField(DbgNode, 7));
690 DIArray DICompileUnit::getRetainedTypes() const {
691 if (!DbgNode || DbgNode->getNumOperands() < 13)
694 return DIArray(getNodeField(DbgNode, 8));
697 DIArray DICompileUnit::getSubprograms() const {
698 if (!DbgNode || DbgNode->getNumOperands() < 13)
701 return DIArray(getNodeField(DbgNode, 9));
705 DIArray DICompileUnit::getGlobalVariables() const {
706 if (!DbgNode || DbgNode->getNumOperands() < 13)
709 return DIArray(getNodeField(DbgNode, 10));
712 DIArray DICompileUnit::getImportedEntities() const {
713 if (!DbgNode || DbgNode->getNumOperands() < 13)
716 return DIArray(getNodeField(DbgNode, 11));
719 /// fixupSubprogramName - Replace contains special characters used
720 /// in a typical Objective-C names with '.' in a given string.
721 static void fixupSubprogramName(DISubprogram Fn, SmallVectorImpl<char> &Out) {
723 Fn.getFunction() ? Fn.getFunction()->getName() : Fn.getName();
724 FName = Function::getRealLinkageName(FName);
726 StringRef Prefix("llvm.dbg.lv.");
727 Out.reserve(FName.size() + Prefix.size());
728 Out.append(Prefix.begin(), Prefix.end());
730 bool isObjCLike = false;
731 for (size_t i = 0, e = FName.size(); i < e; ++i) {
736 if (isObjCLike && (C == '[' || C == ']' || C == ' ' || C == ':' ||
737 C == '+' || C == '(' || C == ')'))
744 /// getFnSpecificMDNode - Return a NameMDNode, if available, that is
745 /// suitable to hold function specific information.
746 NamedMDNode *llvm::getFnSpecificMDNode(const Module &M, DISubprogram Fn) {
747 SmallString<32> Name;
748 fixupSubprogramName(Fn, Name);
749 return M.getNamedMetadata(Name.str());
752 /// getOrInsertFnSpecificMDNode - Return a NameMDNode that is suitable
753 /// to hold function specific information.
754 NamedMDNode *llvm::getOrInsertFnSpecificMDNode(Module &M, DISubprogram Fn) {
755 SmallString<32> Name;
756 fixupSubprogramName(Fn, Name);
757 return M.getOrInsertNamedMetadata(Name.str());
760 /// createInlinedVariable - Create a new inlined variable based on current
762 /// @param DV Current Variable.
763 /// @param InlinedScope Location at current variable is inlined.
764 DIVariable llvm::createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
765 LLVMContext &VMContext) {
766 SmallVector<Value *, 16> Elts;
767 // Insert inlined scope as 7th element.
768 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
769 i == 7 ? Elts.push_back(InlinedScope) :
770 Elts.push_back(DV->getOperand(i));
771 return DIVariable(MDNode::get(VMContext, Elts));
774 /// cleanseInlinedVariable - Remove inlined scope from the variable.
775 DIVariable llvm::cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext) {
776 SmallVector<Value *, 16> Elts;
777 // Insert inlined scope as 7th element.
778 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
780 Elts.push_back(Constant::getNullValue(Type::getInt32Ty(VMContext))):
781 Elts.push_back(DV->getOperand(i));
782 return DIVariable(MDNode::get(VMContext, Elts));
785 /// getDISubprogram - Find subprogram that is enclosing this scope.
786 DISubprogram llvm::getDISubprogram(const MDNode *Scope) {
787 DIDescriptor D(Scope);
788 if (D.isSubprogram())
789 return DISubprogram(Scope);
791 if (D.isLexicalBlockFile())
792 return getDISubprogram(DILexicalBlockFile(Scope).getContext());
794 if (D.isLexicalBlock())
795 return getDISubprogram(DILexicalBlock(Scope).getContext());
797 return DISubprogram();
800 /// getDICompositeType - Find underlying composite type.
801 DICompositeType llvm::getDICompositeType(DIType T) {
802 if (T.isCompositeType())
803 return DICompositeType(T);
805 if (T.isDerivedType())
806 return getDICompositeType(DIDerivedType(T).getTypeDerivedFrom());
808 return DICompositeType();
811 /// isSubprogramContext - Return true if Context is either a subprogram
812 /// or another context nested inside a subprogram.
813 bool llvm::isSubprogramContext(const MDNode *Context) {
816 DIDescriptor D(Context);
817 if (D.isSubprogram())
820 return isSubprogramContext(DIType(Context).getContext());
824 //===----------------------------------------------------------------------===//
825 // DebugInfoFinder implementations.
826 //===----------------------------------------------------------------------===//
828 void DebugInfoFinder::reset() {
837 /// processModule - Process entire module and collect debug info.
838 void DebugInfoFinder::processModule(const Module &M) {
839 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
840 for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
841 DICompileUnit CU(CU_Nodes->getOperand(i));
843 DIArray GVs = CU.getGlobalVariables();
844 for (unsigned i = 0, e = GVs.getNumElements(); i != e; ++i) {
845 DIGlobalVariable DIG(GVs.getElement(i));
846 if (addGlobalVariable(DIG)) {
847 processScope(DIG.getContext());
848 processType(DIG.getType());
851 DIArray SPs = CU.getSubprograms();
852 for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i)
853 processSubprogram(DISubprogram(SPs.getElement(i)));
854 DIArray EnumTypes = CU.getEnumTypes();
855 for (unsigned i = 0, e = EnumTypes.getNumElements(); i != e; ++i)
856 processType(DIType(EnumTypes.getElement(i)));
857 DIArray RetainedTypes = CU.getRetainedTypes();
858 for (unsigned i = 0, e = RetainedTypes.getNumElements(); i != e; ++i)
859 processType(DIType(RetainedTypes.getElement(i)));
860 // FIXME: We really shouldn't be bailing out after visiting just one CU
866 /// processLocation - Process DILocation.
867 void DebugInfoFinder::processLocation(DILocation Loc) {
868 if (!Loc.Verify()) return;
869 DIDescriptor S(Loc.getScope());
870 if (S.isCompileUnit())
871 addCompileUnit(DICompileUnit(S));
872 else if (S.isSubprogram())
873 processSubprogram(DISubprogram(S));
874 else if (S.isLexicalBlock())
875 processLexicalBlock(DILexicalBlock(S));
876 else if (S.isLexicalBlockFile()) {
877 DILexicalBlockFile DBF = DILexicalBlockFile(S);
878 processLexicalBlock(DILexicalBlock(DBF.getScope()));
880 processLocation(Loc.getOrigLocation());
883 /// processType - Process DIType.
884 void DebugInfoFinder::processType(DIType DT) {
887 processScope(DT.getContext());
888 if (DT.isCompositeType()) {
889 DICompositeType DCT(DT);
890 processType(DCT.getTypeDerivedFrom());
891 DIArray DA = DCT.getTypeArray();
892 for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
893 DIDescriptor D = DA.getElement(i);
895 processType(DIType(D));
896 else if (D.isSubprogram())
897 processSubprogram(DISubprogram(D));
899 } else if (DT.isDerivedType()) {
900 DIDerivedType DDT(DT);
901 processType(DDT.getTypeDerivedFrom());
905 void DebugInfoFinder::processScope(DIScope Scope) {
906 if (Scope.isType()) {
911 if (Scope.isCompileUnit()) {
912 addCompileUnit(DICompileUnit(Scope));
915 if (Scope.isSubprogram()) {
916 processSubprogram(DISubprogram(Scope));
919 if (!addScope(Scope))
921 if (Scope.isLexicalBlock()) {
922 DILexicalBlock LB(Scope);
923 processScope(LB.getContext());
924 } else if (Scope.isLexicalBlockFile()) {
925 DILexicalBlockFile LBF = DILexicalBlockFile(Scope);
926 processScope(LBF.getScope());
927 } else if (Scope.isNameSpace()) {
928 DINameSpace NS(Scope);
929 processScope(NS.getContext());
933 /// processLexicalBlock
934 void DebugInfoFinder::processLexicalBlock(DILexicalBlock LB) {
935 DIScope Context = LB.getContext();
936 if (Context.isLexicalBlock())
937 return processLexicalBlock(DILexicalBlock(Context));
938 else if (Context.isLexicalBlockFile()) {
939 DILexicalBlockFile DBF = DILexicalBlockFile(Context);
940 return processLexicalBlock(DILexicalBlock(DBF.getScope()));
943 return processSubprogram(DISubprogram(Context));
946 /// processSubprogram - Process DISubprogram.
947 void DebugInfoFinder::processSubprogram(DISubprogram SP) {
948 if (!addSubprogram(SP))
950 processScope(SP.getContext());
951 processType(SP.getType());
954 /// processDeclare - Process DbgDeclareInst.
955 void DebugInfoFinder::processDeclare(const DbgDeclareInst *DDI) {
956 MDNode *N = dyn_cast<MDNode>(DDI->getVariable());
960 if (!DV.isVariable())
963 if (!NodesSeen.insert(DV))
965 processScope(DIVariable(N).getContext());
966 processType(DIVariable(N).getType());
969 void DebugInfoFinder::processValue(const DbgValueInst *DVI) {
970 MDNode *N = dyn_cast<MDNode>(DVI->getVariable());
974 if (!DV.isVariable())
977 if (!NodesSeen.insert(DV))
979 processType(DIVariable(N).getType());
982 /// addType - Add type into Tys.
983 bool DebugInfoFinder::addType(DIType DT) {
987 if (!NodesSeen.insert(DT))
994 /// addCompileUnit - Add compile unit into CUs.
995 bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
999 if (!NodesSeen.insert(CU))
1006 /// addGlobalVariable - Add global variable into GVs.
1007 bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
1008 if (!DIDescriptor(DIG).isGlobalVariable())
1011 if (!NodesSeen.insert(DIG))
1018 // addSubprogram - Add subprgoram into SPs.
1019 bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
1020 if (!DIDescriptor(SP).isSubprogram())
1023 if (!NodesSeen.insert(SP))
1030 bool DebugInfoFinder::addScope(DIScope Scope) {
1033 if (!NodesSeen.insert(Scope))
1035 Scopes.push_back(Scope);
1039 //===----------------------------------------------------------------------===//
1040 // DIDescriptor: dump routines for all descriptors.
1041 //===----------------------------------------------------------------------===//
1043 /// dump - Print descriptor to dbgs() with a newline.
1044 void DIDescriptor::dump() const {
1045 print(dbgs()); dbgs() << '\n';
1048 /// print - Print descriptor.
1049 void DIDescriptor::print(raw_ostream &OS) const {
1050 if (!DbgNode) return;
1052 if (const char *Tag = dwarf::TagString(getTag()))
1053 OS << "[ " << Tag << " ]";
1055 if (this->isSubrange()) {
1056 DISubrange(DbgNode).printInternal(OS);
1057 } else if (this->isCompileUnit()) {
1058 DICompileUnit(DbgNode).printInternal(OS);
1059 } else if (this->isFile()) {
1060 DIFile(DbgNode).printInternal(OS);
1061 } else if (this->isEnumerator()) {
1062 DIEnumerator(DbgNode).printInternal(OS);
1063 } else if (this->isBasicType()) {
1064 DIType(DbgNode).printInternal(OS);
1065 } else if (this->isDerivedType()) {
1066 DIDerivedType(DbgNode).printInternal(OS);
1067 } else if (this->isCompositeType()) {
1068 DICompositeType(DbgNode).printInternal(OS);
1069 } else if (this->isSubprogram()) {
1070 DISubprogram(DbgNode).printInternal(OS);
1071 } else if (this->isGlobalVariable()) {
1072 DIGlobalVariable(DbgNode).printInternal(OS);
1073 } else if (this->isVariable()) {
1074 DIVariable(DbgNode).printInternal(OS);
1075 } else if (this->isObjCProperty()) {
1076 DIObjCProperty(DbgNode).printInternal(OS);
1077 } else if (this->isNameSpace()) {
1078 DINameSpace(DbgNode).printInternal(OS);
1079 } else if (this->isScope()) {
1080 DIScope(DbgNode).printInternal(OS);
1084 void DISubrange::printInternal(raw_ostream &OS) const {
1085 int64_t Count = getCount();
1087 OS << " [" << getLo() << ", " << Count - 1 << ']';
1089 OS << " [unbounded]";
1092 void DIScope::printInternal(raw_ostream &OS) const {
1093 OS << " [" << getDirectory() << "/" << getFilename() << ']';
1096 void DICompileUnit::printInternal(raw_ostream &OS) const {
1097 DIScope::printInternal(OS);
1099 unsigned Lang = getLanguage();
1100 if (const char *LangStr = dwarf::LanguageString(Lang))
1103 (OS << "lang 0x").write_hex(Lang);
1107 void DIEnumerator::printInternal(raw_ostream &OS) const {
1108 OS << " [" << getName() << " :: " << getEnumValue() << ']';
1111 void DIType::printInternal(raw_ostream &OS) const {
1112 if (!DbgNode) return;
1114 StringRef Res = getName();
1116 OS << " [" << Res << "]";
1118 // TODO: Print context?
1120 OS << " [line " << getLineNumber()
1121 << ", size " << getSizeInBits()
1122 << ", align " << getAlignInBits()
1123 << ", offset " << getOffsetInBits();
1125 if (const char *Enc =
1126 dwarf::AttributeEncodingString(DIBasicType(DbgNode).getEncoding()))
1127 OS << ", enc " << Enc;
1132 else if (isProtected())
1133 OS << " [protected]";
1136 OS << " [artificial]";
1138 if (isForwardDecl())
1140 else if (getTag() == dwarf::DW_TAG_structure_type ||
1141 getTag() == dwarf::DW_TAG_union_type ||
1142 getTag() == dwarf::DW_TAG_enumeration_type ||
1143 getTag() == dwarf::DW_TAG_class_type)
1147 if (isStaticMember())
1151 void DIDerivedType::printInternal(raw_ostream &OS) const {
1152 DIType::printInternal(OS);
1153 OS << " [from " << getTypeDerivedFrom().getName() << ']';
1156 void DICompositeType::printInternal(raw_ostream &OS) const {
1157 DIType::printInternal(OS);
1158 DIArray A = getTypeArray();
1159 OS << " [" << A.getNumElements() << " elements]";
1162 void DINameSpace::printInternal(raw_ostream &OS) const {
1163 StringRef Name = getName();
1165 OS << " [" << Name << ']';
1167 OS << " [line " << getLineNumber() << ']';
1170 void DISubprogram::printInternal(raw_ostream &OS) const {
1171 // TODO : Print context
1172 OS << " [line " << getLineNumber() << ']';
1174 if (isLocalToUnit())
1180 if (getScopeLineNumber() != getLineNumber())
1181 OS << " [scope " << getScopeLineNumber() << "]";
1185 else if (isProtected())
1186 OS << " [protected]";
1188 StringRef Res = getName();
1190 OS << " [" << Res << ']';
1193 void DIGlobalVariable::printInternal(raw_ostream &OS) const {
1194 StringRef Res = getName();
1196 OS << " [" << Res << ']';
1198 OS << " [line " << getLineNumber() << ']';
1200 // TODO : Print context
1202 if (isLocalToUnit())
1209 void DIVariable::printInternal(raw_ostream &OS) const {
1210 StringRef Res = getName();
1212 OS << " [" << Res << ']';
1214 OS << " [line " << getLineNumber() << ']';
1217 void DIObjCProperty::printInternal(raw_ostream &OS) const {
1218 StringRef Name = getObjCPropertyName();
1220 OS << " [" << Name << ']';
1222 OS << " [line " << getLineNumber()
1223 << ", properties " << getUnsignedField(6) << ']';
1226 static void printDebugLoc(DebugLoc DL, raw_ostream &CommentOS,
1227 const LLVMContext &Ctx) {
1228 if (!DL.isUnknown()) { // Print source line info.
1229 DIScope Scope(DL.getScope(Ctx));
1230 assert(Scope.isScope() &&
1231 "Scope of a DebugLoc should be a DIScope.");
1232 // Omit the directory, because it's likely to be long and uninteresting.
1233 CommentOS << Scope.getFilename();
1234 CommentOS << ':' << DL.getLine();
1235 if (DL.getCol() != 0)
1236 CommentOS << ':' << DL.getCol();
1237 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(DL.getInlinedAt(Ctx));
1238 if (!InlinedAtDL.isUnknown()) {
1239 CommentOS << " @[ ";
1240 printDebugLoc(InlinedAtDL, CommentOS, Ctx);
1246 void DIVariable::printExtendedName(raw_ostream &OS) const {
1247 const LLVMContext &Ctx = DbgNode->getContext();
1248 StringRef Res = getName();
1250 OS << Res << "," << getLineNumber();
1251 if (MDNode *InlinedAt = getInlinedAt()) {
1252 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(InlinedAt);
1253 if (!InlinedAtDL.isUnknown()) {
1255 printDebugLoc(InlinedAtDL, OS, Ctx);