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 bool DIDescriptor::Verify() const {
39 (DIDerivedType(DbgNode).Verify() ||
40 DICompositeType(DbgNode).Verify() || DIBasicType(DbgNode).Verify() ||
41 DIVariable(DbgNode).Verify() || DISubprogram(DbgNode).Verify() ||
42 DIGlobalVariable(DbgNode).Verify() || DIFile(DbgNode).Verify() ||
43 DICompileUnit(DbgNode).Verify() || DINameSpace(DbgNode).Verify() ||
44 DILexicalBlock(DbgNode).Verify() ||
45 DILexicalBlockFile(DbgNode).Verify() ||
46 DISubrange(DbgNode).Verify() || DIEnumerator(DbgNode).Verify() ||
47 DIObjCProperty(DbgNode).Verify() ||
48 DITemplateTypeParameter(DbgNode).Verify() ||
49 DITemplateValueParameter(DbgNode).Verify() ||
50 DIImportedEntity(DbgNode).Verify());
53 static Value *getField(const MDNode *DbgNode, unsigned Elt) {
54 if (DbgNode == 0 || Elt >= DbgNode->getNumOperands())
56 return DbgNode->getOperand(Elt);
59 static MDNode *getNodeField(const MDNode *DbgNode, unsigned Elt) {
60 return dyn_cast_or_null<MDNode>(getField(DbgNode, Elt));
63 static StringRef getStringField(const MDNode *DbgNode, unsigned Elt) {
64 if (MDString *MDS = dyn_cast_or_null<MDString>(getField(DbgNode, Elt)))
65 return MDS->getString();
69 StringRef DIDescriptor::getStringField(unsigned Elt) const {
70 return ::getStringField(DbgNode, Elt);
73 uint64_t DIDescriptor::getUInt64Field(unsigned Elt) const {
77 if (Elt < DbgNode->getNumOperands())
79 = dyn_cast_or_null<ConstantInt>(DbgNode->getOperand(Elt)))
80 return CI->getZExtValue();
85 int64_t DIDescriptor::getInt64Field(unsigned Elt) const {
89 if (Elt < DbgNode->getNumOperands())
91 = dyn_cast_or_null<ConstantInt>(DbgNode->getOperand(Elt)))
92 return CI->getSExtValue();
97 DIDescriptor DIDescriptor::getDescriptorField(unsigned Elt) const {
98 MDNode *Field = getNodeField(DbgNode, Elt);
99 return DIDescriptor(Field);
102 GlobalVariable *DIDescriptor::getGlobalVariableField(unsigned Elt) const {
106 if (Elt < DbgNode->getNumOperands())
107 return dyn_cast_or_null<GlobalVariable>(DbgNode->getOperand(Elt));
111 Constant *DIDescriptor::getConstantField(unsigned Elt) const {
115 if (Elt < DbgNode->getNumOperands())
116 return dyn_cast_or_null<Constant>(DbgNode->getOperand(Elt));
120 Function *DIDescriptor::getFunctionField(unsigned Elt) const {
124 if (Elt < DbgNode->getNumOperands())
125 return dyn_cast_or_null<Function>(DbgNode->getOperand(Elt));
129 void DIDescriptor::replaceFunctionField(unsigned Elt, Function *F) {
133 if (Elt < DbgNode->getNumOperands()) {
134 MDNode *Node = const_cast<MDNode*>(DbgNode);
135 Node->replaceOperandWith(Elt, F);
139 unsigned DIVariable::getNumAddrElements() const {
140 return DbgNode->getNumOperands()-8;
143 /// getInlinedAt - If this variable is inlined then return inline location.
144 MDNode *DIVariable::getInlinedAt() const {
145 return getNodeField(DbgNode, 7);
148 //===----------------------------------------------------------------------===//
150 //===----------------------------------------------------------------------===//
152 /// isBasicType - Return true if the specified tag is legal for
154 bool DIDescriptor::isBasicType() const {
155 if (!DbgNode) return false;
157 case dwarf::DW_TAG_base_type:
158 case dwarf::DW_TAG_unspecified_type:
165 /// isDerivedType - Return true if the specified tag is legal for DIDerivedType.
166 bool DIDescriptor::isDerivedType() const {
167 if (!DbgNode) return false;
169 case dwarf::DW_TAG_typedef:
170 case dwarf::DW_TAG_pointer_type:
171 case dwarf::DW_TAG_ptr_to_member_type:
172 case dwarf::DW_TAG_reference_type:
173 case dwarf::DW_TAG_rvalue_reference_type:
174 case dwarf::DW_TAG_const_type:
175 case dwarf::DW_TAG_volatile_type:
176 case dwarf::DW_TAG_restrict_type:
177 case dwarf::DW_TAG_member:
178 case dwarf::DW_TAG_inheritance:
179 case dwarf::DW_TAG_friend:
182 // CompositeTypes are currently modelled as DerivedTypes.
183 return isCompositeType();
187 /// isCompositeType - Return true if the specified tag is legal for
189 bool DIDescriptor::isCompositeType() const {
190 if (!DbgNode) return false;
192 case dwarf::DW_TAG_array_type:
193 case dwarf::DW_TAG_structure_type:
194 case dwarf::DW_TAG_union_type:
195 case dwarf::DW_TAG_enumeration_type:
196 case dwarf::DW_TAG_subroutine_type:
197 case dwarf::DW_TAG_class_type:
204 /// isVariable - Return true if the specified tag is legal for DIVariable.
205 bool DIDescriptor::isVariable() const {
206 if (!DbgNode) return false;
208 case dwarf::DW_TAG_auto_variable:
209 case dwarf::DW_TAG_arg_variable:
216 /// isType - Return true if the specified tag is legal for DIType.
217 bool DIDescriptor::isType() const {
218 return isBasicType() || isCompositeType() || isDerivedType();
221 /// isSubprogram - Return true if the specified tag is legal for
223 bool DIDescriptor::isSubprogram() const {
224 return DbgNode && getTag() == dwarf::DW_TAG_subprogram;
227 /// isGlobalVariable - Return true if the specified tag is legal for
228 /// DIGlobalVariable.
229 bool DIDescriptor::isGlobalVariable() const {
230 return DbgNode && (getTag() == dwarf::DW_TAG_variable ||
231 getTag() == dwarf::DW_TAG_constant);
234 /// isUnspecifiedParmeter - Return true if the specified tag is
235 /// DW_TAG_unspecified_parameters.
236 bool DIDescriptor::isUnspecifiedParameter() const {
237 return DbgNode && getTag() == dwarf::DW_TAG_unspecified_parameters;
240 /// isScope - Return true if the specified tag is one of the scope
242 bool DIDescriptor::isScope() const {
243 if (!DbgNode) return false;
245 case dwarf::DW_TAG_compile_unit:
246 case dwarf::DW_TAG_lexical_block:
247 case dwarf::DW_TAG_subprogram:
248 case dwarf::DW_TAG_namespace:
249 case dwarf::DW_TAG_file_type:
257 /// isTemplateTypeParameter - Return true if the specified tag is
258 /// DW_TAG_template_type_parameter.
259 bool DIDescriptor::isTemplateTypeParameter() const {
260 return DbgNode && getTag() == dwarf::DW_TAG_template_type_parameter;
263 /// isTemplateValueParameter - Return true if the specified tag is
264 /// DW_TAG_template_value_parameter.
265 bool DIDescriptor::isTemplateValueParameter() const {
266 return DbgNode && (getTag() == dwarf::DW_TAG_template_value_parameter ||
267 getTag() == dwarf::DW_TAG_GNU_template_template_param ||
268 getTag() == dwarf::DW_TAG_GNU_template_parameter_pack);
271 /// isCompileUnit - Return true if the specified tag is DW_TAG_compile_unit.
272 bool DIDescriptor::isCompileUnit() const {
273 return DbgNode && getTag() == dwarf::DW_TAG_compile_unit;
276 /// isFile - Return true if the specified tag is DW_TAG_file_type.
277 bool DIDescriptor::isFile() const {
278 return DbgNode && getTag() == dwarf::DW_TAG_file_type;
281 /// isNameSpace - Return true if the specified tag is DW_TAG_namespace.
282 bool DIDescriptor::isNameSpace() const {
283 return DbgNode && getTag() == dwarf::DW_TAG_namespace;
286 /// isLexicalBlockFile - Return true if the specified descriptor is a
287 /// lexical block with an extra file.
288 bool DIDescriptor::isLexicalBlockFile() const {
289 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
290 (DbgNode->getNumOperands() == 3);
293 /// isLexicalBlock - Return true if the specified tag is DW_TAG_lexical_block.
294 bool DIDescriptor::isLexicalBlock() const {
295 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
296 (DbgNode->getNumOperands() > 3);
299 /// isSubrange - Return true if the specified tag is DW_TAG_subrange_type.
300 bool DIDescriptor::isSubrange() const {
301 return DbgNode && getTag() == dwarf::DW_TAG_subrange_type;
304 /// isEnumerator - Return true if the specified tag is DW_TAG_enumerator.
305 bool DIDescriptor::isEnumerator() const {
306 return DbgNode && getTag() == dwarf::DW_TAG_enumerator;
309 /// isObjCProperty - Return true if the specified tag is DW_TAG_APPLE_property.
310 bool DIDescriptor::isObjCProperty() const {
311 return DbgNode && getTag() == dwarf::DW_TAG_APPLE_property;
314 /// \brief Return true if the specified tag is DW_TAG_imported_module or
315 /// DW_TAG_imported_declaration.
316 bool DIDescriptor::isImportedEntity() const {
317 return DbgNode && (getTag() == dwarf::DW_TAG_imported_module ||
318 getTag() == dwarf::DW_TAG_imported_declaration);
321 //===----------------------------------------------------------------------===//
322 // Simple Descriptor Constructors and other Methods
323 //===----------------------------------------------------------------------===//
325 unsigned DIArray::getNumElements() const {
328 return DbgNode->getNumOperands();
331 /// replaceAllUsesWith - Replace all uses of the MDNode used by this
332 /// type with the one in the passed descriptor.
333 void DIType::replaceAllUsesWith(DIDescriptor &D) {
335 assert(DbgNode && "Trying to replace an unverified type!");
337 // Since we use a TrackingVH for the node, its easy for clients to manufacture
338 // legitimate situations where they want to replaceAllUsesWith() on something
339 // which, due to uniquing, has merged with the source. We shield clients from
340 // this detail by allowing a value to be replaced with replaceAllUsesWith()
343 MDNode *Node = const_cast<MDNode*>(DbgNode);
344 const MDNode *DN = D;
345 const Value *V = cast_or_null<Value>(DN);
346 Node->replaceAllUsesWith(const_cast<Value*>(V));
347 MDNode::deleteTemporary(Node);
351 /// replaceAllUsesWith - Replace all uses of the MDNode used by this
352 /// type with the one in D.
353 void DIType::replaceAllUsesWith(MDNode *D) {
355 assert(DbgNode && "Trying to replace an unverified type!");
357 // Since we use a TrackingVH for the node, its easy for clients to manufacture
358 // legitimate situations where they want to replaceAllUsesWith() on something
359 // which, due to uniquing, has merged with the source. We shield clients from
360 // this detail by allowing a value to be replaced with replaceAllUsesWith()
363 MDNode *Node = const_cast<MDNode*>(DbgNode);
364 const MDNode *DN = D;
365 const Value *V = cast_or_null<Value>(DN);
366 Node->replaceAllUsesWith(const_cast<Value*>(V));
367 MDNode::deleteTemporary(Node);
371 /// isUnsignedDIType - Return true if type encoding is unsigned.
372 bool DIType::isUnsignedDIType() {
373 DIDerivedType DTy(DbgNode);
375 return DTy.getTypeDerivedFrom().isUnsignedDIType();
377 DIBasicType BTy(DbgNode);
379 unsigned Encoding = BTy.getEncoding();
380 if (Encoding == dwarf::DW_ATE_unsigned ||
381 Encoding == dwarf::DW_ATE_unsigned_char ||
382 Encoding == dwarf::DW_ATE_boolean)
388 /// Verify - Verify that a compile unit is well formed.
389 bool DICompileUnit::Verify() const {
390 if (!isCompileUnit())
393 // Don't bother verifying the compilation directory or producer string
394 // as those could be empty.
395 if (getFilename().empty())
398 return DbgNode->getNumOperands() == 13;
401 /// Verify - Verify that an ObjC property is well formed.
402 bool DIObjCProperty::Verify() const {
403 if (!isObjCProperty())
406 // Don't worry about the rest of the strings for now.
407 return DbgNode->getNumOperands() == 8;
410 /// Check if a field at position Elt of a MDNode is a MDNode.
411 /// We currently allow an empty string and an integer.
412 /// But we don't allow a non-empty string in a MDNode field.
413 static bool fieldIsMDNode(const MDNode *DbgNode, unsigned Elt) {
414 // FIXME: This function should return true, if the field is null or the field
415 // is indeed a MDNode: return !Fld || isa<MDNode>(Fld).
416 Value *Fld = getField(DbgNode, Elt);
417 if (Fld && isa<MDString>(Fld) &&
418 !cast<MDString>(Fld)->getString().empty())
423 /// Check if a field at position Elt of a MDNode is a MDString.
424 static bool fieldIsMDString(const MDNode *DbgNode, unsigned Elt) {
425 Value *Fld = getField(DbgNode, Elt);
426 return !Fld || isa<MDString>(Fld);
429 /// Check if a value can be a TypeRef.
430 static bool isTypeRef(const Value *Val) {
431 return !Val || isa<MDString>(Val) || isa<MDNode>(Val);
434 /// Check if a field at position Elt of a MDNode can be a TypeRef.
435 static bool fieldIsTypeRef(const MDNode *DbgNode, unsigned Elt) {
436 Value *Fld = getField(DbgNode, Elt);
437 return isTypeRef(Fld);
440 /// Verify - Verify that a type descriptor is well formed.
441 bool DIType::Verify() const {
444 // Make sure Context @ field 2 is MDNode.
445 if (!fieldIsMDNode(DbgNode, 2))
448 // FIXME: Sink this into the various subclass verifies.
449 uint16_t Tag = getTag();
450 if (!isBasicType() && Tag != dwarf::DW_TAG_const_type &&
451 Tag != dwarf::DW_TAG_volatile_type && Tag != dwarf::DW_TAG_pointer_type &&
452 Tag != dwarf::DW_TAG_ptr_to_member_type &&
453 Tag != dwarf::DW_TAG_reference_type &&
454 Tag != dwarf::DW_TAG_rvalue_reference_type &&
455 Tag != dwarf::DW_TAG_restrict_type && Tag != dwarf::DW_TAG_array_type &&
456 Tag != dwarf::DW_TAG_enumeration_type &&
457 Tag != dwarf::DW_TAG_subroutine_type &&
458 Tag != dwarf::DW_TAG_inheritance && Tag != dwarf::DW_TAG_friend &&
459 getFilename().empty())
461 // DIType is abstract, it should be a BasicType, a DerivedType or
464 DIBasicType(DbgNode).Verify();
465 else if (isCompositeType())
466 DICompositeType(DbgNode).Verify();
467 else if (isDerivedType())
468 DIDerivedType(DbgNode).Verify();
474 /// Verify - Verify that a basic type descriptor is well formed.
475 bool DIBasicType::Verify() const {
476 return isBasicType() && DbgNode->getNumOperands() == 10;
479 /// Verify - Verify that a derived type descriptor is well formed.
480 bool DIDerivedType::Verify() const {
481 // Make sure DerivedFrom @ field 9 is MDNode.
482 if (!fieldIsMDNode(DbgNode, 9))
484 if (getTag() == dwarf::DW_TAG_ptr_to_member_type)
485 // Make sure ClassType @ field 10 is a TypeRef.
486 if (!fieldIsTypeRef(DbgNode, 10))
489 return isDerivedType() && DbgNode->getNumOperands() >= 10 &&
490 DbgNode->getNumOperands() <= 14;
493 /// Verify - Verify that a composite type descriptor is well formed.
494 bool DICompositeType::Verify() const {
495 if (!isCompositeType())
498 // Make sure DerivedFrom @ field 9 and ContainingType @ field 12 are MDNodes.
499 if (!fieldIsMDNode(DbgNode, 9))
501 if (!fieldIsTypeRef(DbgNode, 12))
504 // Make sure the type identifier at field 14 is MDString, it can be null.
505 if (!fieldIsMDString(DbgNode, 14))
508 // If this is an array type verify that we have a DIType in the derived type
509 // field as that's the type of our element.
510 if (getTag() == dwarf::DW_TAG_array_type)
511 if (!DIType(getTypeDerivedFrom()))
514 return DbgNode->getNumOperands() == 15;
517 /// Verify - Verify that a subprogram descriptor is well formed.
518 bool DISubprogram::Verify() const {
522 // Make sure context @ field 2 and type @ field 7 are MDNodes.
523 if (!fieldIsMDNode(DbgNode, 2))
525 if (!fieldIsMDNode(DbgNode, 7))
527 // Containing type @ field 12.
528 if (!fieldIsTypeRef(DbgNode, 12))
530 return DbgNode->getNumOperands() == 20;
533 /// Verify - Verify that a global variable descriptor is well formed.
534 bool DIGlobalVariable::Verify() const {
535 if (!isGlobalVariable())
538 if (getDisplayName().empty())
540 // Make sure context @ field 2 and type @ field 8 are MDNodes.
541 if (!fieldIsMDNode(DbgNode, 2))
543 if (!fieldIsMDNode(DbgNode, 8))
545 // Make sure StaticDataMemberDeclaration @ field 12 is MDNode.
546 if (!fieldIsMDNode(DbgNode, 12))
549 return DbgNode->getNumOperands() == 13;
552 /// Verify - Verify that a variable descriptor is well formed.
553 bool DIVariable::Verify() const {
557 // Make sure context @ field 1 and type @ field 5 are MDNodes.
558 if (!fieldIsMDNode(DbgNode, 1))
560 if (!fieldIsMDNode(DbgNode, 5))
562 return DbgNode->getNumOperands() >= 8;
565 /// Verify - Verify that a location descriptor is well formed.
566 bool DILocation::Verify() const {
570 return DbgNode->getNumOperands() == 4;
573 /// Verify - Verify that a namespace descriptor is well formed.
574 bool DINameSpace::Verify() const {
577 return DbgNode->getNumOperands() == 5;
580 /// \brief Retrieve the MDNode for the directory/file pair.
581 MDNode *DIFile::getFileNode() const {
582 return getNodeField(DbgNode, 1);
585 /// \brief Verify that the file descriptor is well formed.
586 bool DIFile::Verify() const {
587 return isFile() && DbgNode->getNumOperands() == 2;
590 /// \brief Verify that the enumerator descriptor is well formed.
591 bool DIEnumerator::Verify() const {
592 return isEnumerator() && DbgNode->getNumOperands() == 3;
595 /// \brief Verify that the subrange descriptor is well formed.
596 bool DISubrange::Verify() const {
597 return isSubrange() && DbgNode->getNumOperands() == 3;
600 /// \brief Verify that the lexical block descriptor is well formed.
601 bool DILexicalBlock::Verify() const {
602 return isLexicalBlock() && DbgNode->getNumOperands() == 6;
605 /// \brief Verify that the file-scoped lexical block descriptor is well formed.
606 bool DILexicalBlockFile::Verify() const {
607 return isLexicalBlockFile() && DbgNode->getNumOperands() == 3;
610 /// \brief Verify that the template type parameter descriptor is well formed.
611 bool DITemplateTypeParameter::Verify() const {
612 return isTemplateTypeParameter() && DbgNode->getNumOperands() == 7;
615 /// \brief Verify that the template value parameter descriptor is well formed.
616 bool DITemplateValueParameter::Verify() const {
617 return isTemplateValueParameter() && DbgNode->getNumOperands() == 8;
620 /// \brief Verify that the imported module descriptor is well formed.
621 bool DIImportedEntity::Verify() const {
622 return isImportedEntity() &&
623 (DbgNode->getNumOperands() == 4 || DbgNode->getNumOperands() == 5);
626 /// getOriginalTypeSize - If this type is derived from a base type then
627 /// return base type size.
628 uint64_t DIDerivedType::getOriginalTypeSize() const {
629 uint16_t Tag = getTag();
631 if (Tag != dwarf::DW_TAG_member && Tag != dwarf::DW_TAG_typedef &&
632 Tag != dwarf::DW_TAG_const_type && Tag != dwarf::DW_TAG_volatile_type &&
633 Tag != dwarf::DW_TAG_restrict_type)
634 return getSizeInBits();
636 DIType BaseType = getTypeDerivedFrom();
638 // If this type is not derived from any type then take conservative approach.
639 if (!BaseType.isValid())
640 return getSizeInBits();
642 // If this is a derived type, go ahead and get the base type, unless it's a
643 // reference then it's just the size of the field. Pointer types have no need
644 // of this since they're a different type of qualification on the type.
645 if (BaseType.getTag() == dwarf::DW_TAG_reference_type ||
646 BaseType.getTag() == dwarf::DW_TAG_rvalue_reference_type)
647 return getSizeInBits();
649 if (BaseType.isDerivedType())
650 return DIDerivedType(BaseType).getOriginalTypeSize();
652 return BaseType.getSizeInBits();
655 /// getObjCProperty - Return property node, if this ivar is associated with one.
656 MDNode *DIDerivedType::getObjCProperty() const {
657 return getNodeField(DbgNode, 10);
660 MDString *DICompositeType::getIdentifier() const {
661 return cast_or_null<MDString>(getField(DbgNode, 14));
665 static void VerifySubsetOf(const MDNode *LHS, const MDNode *RHS) {
666 for (unsigned i = 0; i != LHS->getNumOperands(); ++i) {
667 // Skip the 'empty' list (that's a single i32 0, rather than truly empty).
668 if (i == 0 && isa<ConstantInt>(LHS->getOperand(i)))
670 const MDNode *E = cast<MDNode>(LHS->getOperand(i));
672 for (unsigned j = 0; !found && j != RHS->getNumOperands(); ++j)
673 found = E == RHS->getOperand(j);
674 assert(found && "Losing a member during member list replacement");
679 /// \brief Set the array of member DITypes.
680 void DICompositeType::setTypeArray(DIArray Elements, DIArray TParams) {
681 assert((!TParams || DbgNode->getNumOperands() == 15) &&
682 "If you're setting the template parameters this should include a slot "
684 TrackingVH<MDNode> N(*this);
687 // Check that the new list of members contains all the old members as well.
688 if (const MDNode *El = cast_or_null<MDNode>(N->getOperand(10)))
689 VerifySubsetOf(El, Elements);
691 N->replaceOperandWith(10, Elements);
694 N->replaceOperandWith(13, TParams);
698 void DICompositeType::addMember(DIDescriptor D) {
699 SmallVector<llvm::Value *, 16> M;
700 DIArray OrigM = getTypeArray();
701 unsigned Elements = OrigM.getNumElements();
702 if (Elements == 1 && !OrigM.getElement(0))
704 M.reserve(Elements + 1);
705 for (unsigned i = 0; i != Elements; ++i)
706 M.push_back(OrigM.getElement(i));
708 setTypeArray(DIArray(MDNode::get(DbgNode->getContext(), M)));
711 /// Generate a reference to this DIType. Uses the type identifier instead
712 /// of the actual MDNode if possible, to help type uniquing.
713 DITypeRef DIType::generateRef() {
714 if (!isCompositeType())
715 return DITypeRef(*this);
716 DICompositeType DTy(DbgNode);
717 if (!DTy.getIdentifier())
718 return DITypeRef(*this);
719 return DITypeRef(DTy.getIdentifier());
722 /// \brief Set the containing type.
723 void DICompositeType::setContainingType(DICompositeType ContainingType) {
724 TrackingVH<MDNode> N(*this);
725 N->replaceOperandWith(12, ContainingType.generateRef());
729 /// isInlinedFnArgument - Return true if this variable provides debugging
730 /// information for an inlined function arguments.
731 bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
732 assert(CurFn && "Invalid function");
733 if (!getContext().isSubprogram())
735 // This variable is not inlined function argument if its scope
736 // does not describe current function.
737 return !DISubprogram(getContext()).describes(CurFn);
740 /// describes - Return true if this subprogram provides debugging
741 /// information for the function F.
742 bool DISubprogram::describes(const Function *F) {
743 assert(F && "Invalid function");
744 if (F == getFunction())
746 StringRef Name = getLinkageName();
749 if (F->getName() == Name)
754 unsigned DISubprogram::isOptimized() const {
755 assert (DbgNode && "Invalid subprogram descriptor!");
756 if (DbgNode->getNumOperands() == 15)
757 return getUnsignedField(14);
761 MDNode *DISubprogram::getVariablesNodes() const {
762 return getNodeField(DbgNode, 18);
765 DIArray DISubprogram::getVariables() const {
766 return DIArray(getNodeField(DbgNode, 18));
769 Value *DITemplateValueParameter::getValue() const {
770 return getField(DbgNode, 4);
773 // If the current node has a parent scope then return that,
774 // else return an empty scope.
775 DIScope DIScope::getContext() const {
778 return DIType(DbgNode).getContext();
781 return DISubprogram(DbgNode).getContext();
783 if (isLexicalBlock())
784 return DILexicalBlock(DbgNode).getContext();
786 if (isLexicalBlockFile())
787 return DILexicalBlockFile(DbgNode).getContext();
790 return DINameSpace(DbgNode).getContext();
792 assert((isFile() || isCompileUnit()) && "Unhandled type of scope.");
796 StringRef DIScope::getFilename() const {
799 return ::getStringField(getNodeField(DbgNode, 1), 0);
802 StringRef DIScope::getDirectory() const {
805 return ::getStringField(getNodeField(DbgNode, 1), 1);
808 DIArray DICompileUnit::getEnumTypes() const {
809 if (!DbgNode || DbgNode->getNumOperands() < 13)
812 return DIArray(getNodeField(DbgNode, 7));
815 DIArray DICompileUnit::getRetainedTypes() const {
816 if (!DbgNode || DbgNode->getNumOperands() < 13)
819 return DIArray(getNodeField(DbgNode, 8));
822 DIArray DICompileUnit::getSubprograms() const {
823 if (!DbgNode || DbgNode->getNumOperands() < 13)
826 return DIArray(getNodeField(DbgNode, 9));
830 DIArray DICompileUnit::getGlobalVariables() const {
831 if (!DbgNode || DbgNode->getNumOperands() < 13)
834 return DIArray(getNodeField(DbgNode, 10));
837 DIArray DICompileUnit::getImportedEntities() const {
838 if (!DbgNode || DbgNode->getNumOperands() < 13)
841 return DIArray(getNodeField(DbgNode, 11));
844 /// fixupSubprogramName - Replace contains special characters used
845 /// in a typical Objective-C names with '.' in a given string.
846 static void fixupSubprogramName(DISubprogram Fn, SmallVectorImpl<char> &Out) {
848 Fn.getFunction() ? Fn.getFunction()->getName() : Fn.getName();
849 FName = Function::getRealLinkageName(FName);
851 StringRef Prefix("llvm.dbg.lv.");
852 Out.reserve(FName.size() + Prefix.size());
853 Out.append(Prefix.begin(), Prefix.end());
855 bool isObjCLike = false;
856 for (size_t i = 0, e = FName.size(); i < e; ++i) {
861 if (isObjCLike && (C == '[' || C == ']' || C == ' ' || C == ':' ||
862 C == '+' || C == '(' || C == ')'))
869 /// getFnSpecificMDNode - Return a NameMDNode, if available, that is
870 /// suitable to hold function specific information.
871 NamedMDNode *llvm::getFnSpecificMDNode(const Module &M, DISubprogram Fn) {
872 SmallString<32> Name;
873 fixupSubprogramName(Fn, Name);
874 return M.getNamedMetadata(Name.str());
877 /// getOrInsertFnSpecificMDNode - Return a NameMDNode that is suitable
878 /// to hold function specific information.
879 NamedMDNode *llvm::getOrInsertFnSpecificMDNode(Module &M, DISubprogram Fn) {
880 SmallString<32> Name;
881 fixupSubprogramName(Fn, Name);
882 return M.getOrInsertNamedMetadata(Name.str());
885 /// createInlinedVariable - Create a new inlined variable based on current
887 /// @param DV Current Variable.
888 /// @param InlinedScope Location at current variable is inlined.
889 DIVariable llvm::createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
890 LLVMContext &VMContext) {
891 SmallVector<Value *, 16> Elts;
892 // Insert inlined scope as 7th element.
893 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
894 i == 7 ? Elts.push_back(InlinedScope) :
895 Elts.push_back(DV->getOperand(i));
896 return DIVariable(MDNode::get(VMContext, Elts));
899 /// cleanseInlinedVariable - Remove inlined scope from the variable.
900 DIVariable llvm::cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext) {
901 SmallVector<Value *, 16> Elts;
902 // Insert inlined scope as 7th element.
903 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
905 Elts.push_back(Constant::getNullValue(Type::getInt32Ty(VMContext))):
906 Elts.push_back(DV->getOperand(i));
907 return DIVariable(MDNode::get(VMContext, Elts));
910 /// getDISubprogram - Find subprogram that is enclosing this scope.
911 DISubprogram llvm::getDISubprogram(const MDNode *Scope) {
912 DIDescriptor D(Scope);
913 if (D.isSubprogram())
914 return DISubprogram(Scope);
916 if (D.isLexicalBlockFile())
917 return getDISubprogram(DILexicalBlockFile(Scope).getContext());
919 if (D.isLexicalBlock())
920 return getDISubprogram(DILexicalBlock(Scope).getContext());
922 return DISubprogram();
925 /// getDICompositeType - Find underlying composite type.
926 DICompositeType llvm::getDICompositeType(DIType T) {
927 if (T.isCompositeType())
928 return DICompositeType(T);
930 if (T.isDerivedType())
931 return getDICompositeType(DIDerivedType(T).getTypeDerivedFrom());
933 return DICompositeType();
936 /// isSubprogramContext - Return true if Context is either a subprogram
937 /// or another context nested inside a subprogram.
938 bool llvm::isSubprogramContext(const MDNode *Context) {
941 DIDescriptor D(Context);
942 if (D.isSubprogram())
945 return isSubprogramContext(DIType(Context).getContext());
949 /// Update DITypeIdentifierMap by going through retained types of each CU.
950 DITypeIdentifierMap llvm::generateDITypeIdentifierMap(
951 const NamedMDNode *CU_Nodes) {
952 DITypeIdentifierMap Map;
953 for (unsigned CUi = 0, CUe = CU_Nodes->getNumOperands(); CUi != CUe; ++CUi) {
954 DICompileUnit CU(CU_Nodes->getOperand(CUi));
955 DIArray Retain = CU.getRetainedTypes();
956 for (unsigned Ti = 0, Te = Retain.getNumElements(); Ti != Te; ++Ti) {
957 if (!Retain.getElement(Ti).isCompositeType())
959 DICompositeType Ty(Retain.getElement(Ti));
960 if (MDString *TypeId = Ty.getIdentifier()) {
961 // Definition has priority over declaration.
962 // Try to insert (TypeId, Ty) to Map.
963 std::pair<DITypeIdentifierMap::iterator, bool> P =
964 Map.insert(std::make_pair(TypeId, Ty));
965 // If TypeId already exists in Map and this is a definition, replace
966 // whatever we had (declaration or definition) with the definition.
967 if (!P.second && !Ty.isForwardDecl())
968 P.first->second = Ty;
975 //===----------------------------------------------------------------------===//
976 // DebugInfoFinder implementations.
977 //===----------------------------------------------------------------------===//
979 void DebugInfoFinder::reset() {
988 /// processModule - Process entire module and collect debug info.
989 void DebugInfoFinder::processModule(const Module &M) {
990 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
991 for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
992 DICompileUnit CU(CU_Nodes->getOperand(i));
994 DIArray GVs = CU.getGlobalVariables();
995 for (unsigned i = 0, e = GVs.getNumElements(); i != e; ++i) {
996 DIGlobalVariable DIG(GVs.getElement(i));
997 if (addGlobalVariable(DIG)) {
998 processScope(DIG.getContext());
999 processType(DIG.getType());
1002 DIArray SPs = CU.getSubprograms();
1003 for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i)
1004 processSubprogram(DISubprogram(SPs.getElement(i)));
1005 DIArray EnumTypes = CU.getEnumTypes();
1006 for (unsigned i = 0, e = EnumTypes.getNumElements(); i != e; ++i)
1007 processType(DIType(EnumTypes.getElement(i)));
1008 DIArray RetainedTypes = CU.getRetainedTypes();
1009 for (unsigned i = 0, e = RetainedTypes.getNumElements(); i != e; ++i)
1010 processType(DIType(RetainedTypes.getElement(i)));
1011 DIArray Imports = CU.getImportedEntities();
1012 for (unsigned i = 0, e = Imports.getNumElements(); i != e; ++i) {
1013 DIImportedEntity Import = DIImportedEntity(
1014 Imports.getElement(i));
1015 DIDescriptor Entity = Import.getEntity();
1016 if (Entity.isType())
1017 processType(DIType(Entity));
1018 else if (Entity.isSubprogram())
1019 processSubprogram(DISubprogram(Entity));
1020 else if (Entity.isNameSpace())
1021 processScope(DINameSpace(Entity).getContext());
1023 // FIXME: We really shouldn't be bailing out after visiting just one CU
1029 /// processLocation - Process DILocation.
1030 void DebugInfoFinder::processLocation(DILocation Loc) {
1032 processScope(Loc.getScope());
1033 processLocation(Loc.getOrigLocation());
1036 /// processType - Process DIType.
1037 void DebugInfoFinder::processType(DIType DT) {
1040 processScope(DT.getContext());
1041 if (DT.isCompositeType()) {
1042 DICompositeType DCT(DT);
1043 processType(DCT.getTypeDerivedFrom());
1044 DIArray DA = DCT.getTypeArray();
1045 for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
1046 DIDescriptor D = DA.getElement(i);
1048 processType(DIType(D));
1049 else if (D.isSubprogram())
1050 processSubprogram(DISubprogram(D));
1052 } else if (DT.isDerivedType()) {
1053 DIDerivedType DDT(DT);
1054 processType(DDT.getTypeDerivedFrom());
1058 void DebugInfoFinder::processScope(DIScope Scope) {
1059 if (Scope.isType()) {
1064 if (Scope.isCompileUnit()) {
1065 addCompileUnit(DICompileUnit(Scope));
1068 if (Scope.isSubprogram()) {
1069 processSubprogram(DISubprogram(Scope));
1072 if (!addScope(Scope))
1074 if (Scope.isLexicalBlock()) {
1075 DILexicalBlock LB(Scope);
1076 processScope(LB.getContext());
1077 } else if (Scope.isLexicalBlockFile()) {
1078 DILexicalBlockFile LBF = DILexicalBlockFile(Scope);
1079 processScope(LBF.getScope());
1080 } else if (Scope.isNameSpace()) {
1081 DINameSpace NS(Scope);
1082 processScope(NS.getContext());
1086 /// processLexicalBlock
1087 void DebugInfoFinder::processLexicalBlock(DILexicalBlock LB) {
1088 DIScope Context = LB.getContext();
1089 if (Context.isLexicalBlock())
1090 return processLexicalBlock(DILexicalBlock(Context));
1091 else if (Context.isLexicalBlockFile()) {
1092 DILexicalBlockFile DBF = DILexicalBlockFile(Context);
1093 return processLexicalBlock(DILexicalBlock(DBF.getScope()));
1096 return processSubprogram(DISubprogram(Context));
1099 /// processSubprogram - Process DISubprogram.
1100 void DebugInfoFinder::processSubprogram(DISubprogram SP) {
1101 if (!addSubprogram(SP))
1103 processScope(SP.getContext());
1104 processType(SP.getType());
1105 DIArray TParams = SP.getTemplateParams();
1106 for (unsigned I = 0, E = TParams.getNumElements(); I != E; ++I) {
1107 DIDescriptor Element = TParams.getElement(I);
1108 if (Element.isTemplateTypeParameter()) {
1109 DITemplateTypeParameter TType(Element);
1110 processScope(TType.getContext());
1111 processType(TType.getType());
1112 } else if (Element.isTemplateValueParameter()) {
1113 DITemplateValueParameter TVal(Element);
1114 processScope(TVal.getContext());
1115 processType(TVal.getType());
1120 /// processDeclare - Process DbgDeclareInst.
1121 void DebugInfoFinder::processDeclare(const DbgDeclareInst *DDI) {
1122 MDNode *N = dyn_cast<MDNode>(DDI->getVariable());
1126 if (!DV.isVariable())
1129 if (!NodesSeen.insert(DV))
1131 processScope(DIVariable(N).getContext());
1132 processType(DIVariable(N).getType());
1135 void DebugInfoFinder::processValue(const DbgValueInst *DVI) {
1136 MDNode *N = dyn_cast<MDNode>(DVI->getVariable());
1140 if (!DV.isVariable())
1143 if (!NodesSeen.insert(DV))
1145 processScope(DIVariable(N).getContext());
1146 processType(DIVariable(N).getType());
1149 /// addType - Add type into Tys.
1150 bool DebugInfoFinder::addType(DIType DT) {
1154 if (!NodesSeen.insert(DT))
1161 /// addCompileUnit - Add compile unit into CUs.
1162 bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
1165 if (!NodesSeen.insert(CU))
1172 /// addGlobalVariable - Add global variable into GVs.
1173 bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
1177 if (!NodesSeen.insert(DIG))
1184 // addSubprogram - Add subprgoram into SPs.
1185 bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
1189 if (!NodesSeen.insert(SP))
1196 bool DebugInfoFinder::addScope(DIScope Scope) {
1199 // FIXME: Ocaml binding generates a scope with no content, we treat it
1201 if (Scope->getNumOperands() == 0)
1203 if (!NodesSeen.insert(Scope))
1205 Scopes.push_back(Scope);
1209 //===----------------------------------------------------------------------===//
1210 // DIDescriptor: dump routines for all descriptors.
1211 //===----------------------------------------------------------------------===//
1213 /// dump - Print descriptor to dbgs() with a newline.
1214 void DIDescriptor::dump() const {
1215 print(dbgs()); dbgs() << '\n';
1218 /// print - Print descriptor.
1219 void DIDescriptor::print(raw_ostream &OS) const {
1220 if (!DbgNode) return;
1222 if (const char *Tag = dwarf::TagString(getTag()))
1223 OS << "[ " << Tag << " ]";
1225 if (this->isSubrange()) {
1226 DISubrange(DbgNode).printInternal(OS);
1227 } else if (this->isCompileUnit()) {
1228 DICompileUnit(DbgNode).printInternal(OS);
1229 } else if (this->isFile()) {
1230 DIFile(DbgNode).printInternal(OS);
1231 } else if (this->isEnumerator()) {
1232 DIEnumerator(DbgNode).printInternal(OS);
1233 } else if (this->isBasicType()) {
1234 DIType(DbgNode).printInternal(OS);
1235 } else if (this->isDerivedType()) {
1236 DIDerivedType(DbgNode).printInternal(OS);
1237 } else if (this->isCompositeType()) {
1238 DICompositeType(DbgNode).printInternal(OS);
1239 } else if (this->isSubprogram()) {
1240 DISubprogram(DbgNode).printInternal(OS);
1241 } else if (this->isGlobalVariable()) {
1242 DIGlobalVariable(DbgNode).printInternal(OS);
1243 } else if (this->isVariable()) {
1244 DIVariable(DbgNode).printInternal(OS);
1245 } else if (this->isObjCProperty()) {
1246 DIObjCProperty(DbgNode).printInternal(OS);
1247 } else if (this->isNameSpace()) {
1248 DINameSpace(DbgNode).printInternal(OS);
1249 } else if (this->isScope()) {
1250 DIScope(DbgNode).printInternal(OS);
1254 void DISubrange::printInternal(raw_ostream &OS) const {
1255 int64_t Count = getCount();
1257 OS << " [" << getLo() << ", " << Count - 1 << ']';
1259 OS << " [unbounded]";
1262 void DIScope::printInternal(raw_ostream &OS) const {
1263 OS << " [" << getDirectory() << "/" << getFilename() << ']';
1266 void DICompileUnit::printInternal(raw_ostream &OS) const {
1267 DIScope::printInternal(OS);
1269 unsigned Lang = getLanguage();
1270 if (const char *LangStr = dwarf::LanguageString(Lang))
1273 (OS << "lang 0x").write_hex(Lang);
1277 void DIEnumerator::printInternal(raw_ostream &OS) const {
1278 OS << " [" << getName() << " :: " << getEnumValue() << ']';
1281 void DIType::printInternal(raw_ostream &OS) const {
1282 if (!DbgNode) return;
1284 StringRef Res = getName();
1286 OS << " [" << Res << "]";
1288 // TODO: Print context?
1290 OS << " [line " << getLineNumber()
1291 << ", size " << getSizeInBits()
1292 << ", align " << getAlignInBits()
1293 << ", offset " << getOffsetInBits();
1295 if (const char *Enc =
1296 dwarf::AttributeEncodingString(DIBasicType(DbgNode).getEncoding()))
1297 OS << ", enc " << Enc;
1302 else if (isProtected())
1303 OS << " [protected]";
1306 OS << " [artificial]";
1308 if (isForwardDecl())
1310 else if (getTag() == dwarf::DW_TAG_structure_type ||
1311 getTag() == dwarf::DW_TAG_union_type ||
1312 getTag() == dwarf::DW_TAG_enumeration_type ||
1313 getTag() == dwarf::DW_TAG_class_type)
1317 if (isStaticMember())
1321 void DIDerivedType::printInternal(raw_ostream &OS) const {
1322 DIType::printInternal(OS);
1323 OS << " [from " << getTypeDerivedFrom().getName() << ']';
1326 void DICompositeType::printInternal(raw_ostream &OS) const {
1327 DIType::printInternal(OS);
1328 DIArray A = getTypeArray();
1329 OS << " [" << A.getNumElements() << " elements]";
1332 void DINameSpace::printInternal(raw_ostream &OS) const {
1333 StringRef Name = getName();
1335 OS << " [" << Name << ']';
1337 OS << " [line " << getLineNumber() << ']';
1340 void DISubprogram::printInternal(raw_ostream &OS) const {
1341 // TODO : Print context
1342 OS << " [line " << getLineNumber() << ']';
1344 if (isLocalToUnit())
1350 if (getScopeLineNumber() != getLineNumber())
1351 OS << " [scope " << getScopeLineNumber() << "]";
1355 else if (isProtected())
1356 OS << " [protected]";
1358 StringRef Res = getName();
1360 OS << " [" << Res << ']';
1363 void DIGlobalVariable::printInternal(raw_ostream &OS) const {
1364 StringRef Res = getName();
1366 OS << " [" << Res << ']';
1368 OS << " [line " << getLineNumber() << ']';
1370 // TODO : Print context
1372 if (isLocalToUnit())
1379 void DIVariable::printInternal(raw_ostream &OS) const {
1380 StringRef Res = getName();
1382 OS << " [" << Res << ']';
1384 OS << " [line " << getLineNumber() << ']';
1387 void DIObjCProperty::printInternal(raw_ostream &OS) const {
1388 StringRef Name = getObjCPropertyName();
1390 OS << " [" << Name << ']';
1392 OS << " [line " << getLineNumber()
1393 << ", properties " << getUnsignedField(6) << ']';
1396 static void printDebugLoc(DebugLoc DL, raw_ostream &CommentOS,
1397 const LLVMContext &Ctx) {
1398 if (!DL.isUnknown()) { // Print source line info.
1399 DIScope Scope(DL.getScope(Ctx));
1400 assert(Scope.isScope() &&
1401 "Scope of a DebugLoc should be a DIScope.");
1402 // Omit the directory, because it's likely to be long and uninteresting.
1403 CommentOS << Scope.getFilename();
1404 CommentOS << ':' << DL.getLine();
1405 if (DL.getCol() != 0)
1406 CommentOS << ':' << DL.getCol();
1407 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(DL.getInlinedAt(Ctx));
1408 if (!InlinedAtDL.isUnknown()) {
1409 CommentOS << " @[ ";
1410 printDebugLoc(InlinedAtDL, CommentOS, Ctx);
1416 void DIVariable::printExtendedName(raw_ostream &OS) const {
1417 const LLVMContext &Ctx = DbgNode->getContext();
1418 StringRef Res = getName();
1420 OS << Res << "," << getLineNumber();
1421 if (MDNode *InlinedAt = getInlinedAt()) {
1422 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(InlinedAt);
1423 if (!InlinedAtDL.isUnknown()) {
1425 printDebugLoc(InlinedAtDL, OS, Ctx);
1431 DITypeRef::DITypeRef(const Value *V) : TypeVal(V) {
1432 assert(isTypeRef(V) && "DITypeRef should be a MDString or MDNode");
1435 /// Given a DITypeIdentifierMap, tries to find the corresponding
1436 /// DIType for a DITypeRef.
1437 DIType DITypeRef::resolve(const DITypeIdentifierMap &Map) const {
1441 if (const MDNode *MD = dyn_cast<MDNode>(TypeVal)) {
1442 assert(DIType(MD).isType() &&
1443 "MDNode in DITypeRef should be a DIType.");
1447 const MDString *MS = cast<MDString>(TypeVal);
1448 // Find the corresponding MDNode.
1449 DITypeIdentifierMap::const_iterator Iter = Map.find(MS);
1450 assert(Iter != Map.end() && "Identifier not in the type map?");
1451 assert(DIType(Iter->second).isType() &&
1452 "MDNode in DITypeIdentifierMap should be a DIType.");
1453 return Iter->second;
1456 /// Specialize getFieldAs to handle fields that are references to DITypes.
1458 DITypeRef DIDescriptor::getFieldAs<DITypeRef>(unsigned Elt) const {
1459 return DITypeRef(getField(DbgNode, Elt));