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 reference to a type.
430 static bool isTypeRef(const Value *Val) {
432 (isa<MDString>(Val) && !cast<MDString>(Val)->getString().empty()) ||
433 (isa<MDNode>(Val) && DIType(cast<MDNode>(Val)).isType());
436 /// Check if a field at position Elt of a MDNode can be a reference to a type.
437 static bool fieldIsTypeRef(const MDNode *DbgNode, unsigned Elt) {
438 Value *Fld = getField(DbgNode, Elt);
439 return isTypeRef(Fld);
442 /// Check if a value can be a ScopeRef.
443 static bool isScopeRef(const Value *Val) {
445 (isa<MDString>(Val) && !cast<MDString>(Val)->getString().empty()) ||
446 (isa<MDNode>(Val) && DIScope(cast<MDNode>(Val)).isScope());
449 /// Verify - Verify that a type descriptor is well formed.
450 bool DIType::Verify() const {
453 // Make sure Context @ field 2 is MDNode.
454 if (!fieldIsMDNode(DbgNode, 2))
457 // FIXME: Sink this into the various subclass verifies.
458 uint16_t Tag = getTag();
459 if (!isBasicType() && Tag != dwarf::DW_TAG_const_type &&
460 Tag != dwarf::DW_TAG_volatile_type && Tag != dwarf::DW_TAG_pointer_type &&
461 Tag != dwarf::DW_TAG_ptr_to_member_type &&
462 Tag != dwarf::DW_TAG_reference_type &&
463 Tag != dwarf::DW_TAG_rvalue_reference_type &&
464 Tag != dwarf::DW_TAG_restrict_type && Tag != dwarf::DW_TAG_array_type &&
465 Tag != dwarf::DW_TAG_enumeration_type &&
466 Tag != dwarf::DW_TAG_subroutine_type &&
467 Tag != dwarf::DW_TAG_inheritance && Tag != dwarf::DW_TAG_friend &&
468 getFilename().empty())
470 // DIType is abstract, it should be a BasicType, a DerivedType or
473 DIBasicType(DbgNode).Verify();
474 else if (isCompositeType())
475 DICompositeType(DbgNode).Verify();
476 else if (isDerivedType())
477 DIDerivedType(DbgNode).Verify();
483 /// Verify - Verify that a basic type descriptor is well formed.
484 bool DIBasicType::Verify() const {
485 return isBasicType() && DbgNode->getNumOperands() == 10;
488 /// Verify - Verify that a derived type descriptor is well formed.
489 bool DIDerivedType::Verify() const {
490 // Make sure DerivedFrom @ field 9 is MDNode.
491 if (!fieldIsMDNode(DbgNode, 9))
493 if (getTag() == dwarf::DW_TAG_ptr_to_member_type)
494 // Make sure ClassType @ field 10 is a TypeRef.
495 if (!fieldIsTypeRef(DbgNode, 10))
498 return isDerivedType() && DbgNode->getNumOperands() >= 10 &&
499 DbgNode->getNumOperands() <= 14;
502 /// Verify - Verify that a composite type descriptor is well formed.
503 bool DICompositeType::Verify() const {
504 if (!isCompositeType())
507 // Make sure DerivedFrom @ field 9 and ContainingType @ field 12 are MDNodes.
508 if (!fieldIsMDNode(DbgNode, 9))
510 if (!fieldIsTypeRef(DbgNode, 12))
513 // Make sure the type identifier at field 14 is MDString, it can be null.
514 if (!fieldIsMDString(DbgNode, 14))
517 // If this is an array type verify that we have a DIType in the derived type
518 // field as that's the type of our element.
519 if (getTag() == dwarf::DW_TAG_array_type)
520 if (!DIType(getTypeDerivedFrom()))
523 return DbgNode->getNumOperands() == 15;
526 /// Verify - Verify that a subprogram descriptor is well formed.
527 bool DISubprogram::Verify() const {
531 // Make sure context @ field 2 and type @ field 7 are MDNodes.
532 if (!fieldIsMDNode(DbgNode, 2))
534 if (!fieldIsMDNode(DbgNode, 7))
536 // Containing type @ field 12.
537 if (!fieldIsTypeRef(DbgNode, 12))
539 return DbgNode->getNumOperands() == 20;
542 /// Verify - Verify that a global variable descriptor is well formed.
543 bool DIGlobalVariable::Verify() const {
544 if (!isGlobalVariable())
547 if (getDisplayName().empty())
549 // Make sure context @ field 2 and type @ field 8 are MDNodes.
550 if (!fieldIsMDNode(DbgNode, 2))
552 if (!fieldIsMDNode(DbgNode, 8))
554 // Make sure StaticDataMemberDeclaration @ field 12 is MDNode.
555 if (!fieldIsMDNode(DbgNode, 12))
558 return DbgNode->getNumOperands() == 13;
561 /// Verify - Verify that a variable descriptor is well formed.
562 bool DIVariable::Verify() const {
566 // Make sure context @ field 1 and type @ field 5 are MDNodes.
567 if (!fieldIsMDNode(DbgNode, 1))
569 if (!fieldIsMDNode(DbgNode, 5))
571 return DbgNode->getNumOperands() >= 8;
574 /// Verify - Verify that a location descriptor is well formed.
575 bool DILocation::Verify() const {
579 return DbgNode->getNumOperands() == 4;
582 /// Verify - Verify that a namespace descriptor is well formed.
583 bool DINameSpace::Verify() const {
586 return DbgNode->getNumOperands() == 5;
589 /// \brief Retrieve the MDNode for the directory/file pair.
590 MDNode *DIFile::getFileNode() const {
591 return getNodeField(DbgNode, 1);
594 /// \brief Verify that the file descriptor is well formed.
595 bool DIFile::Verify() const {
596 return isFile() && DbgNode->getNumOperands() == 2;
599 /// \brief Verify that the enumerator descriptor is well formed.
600 bool DIEnumerator::Verify() const {
601 return isEnumerator() && DbgNode->getNumOperands() == 3;
604 /// \brief Verify that the subrange descriptor is well formed.
605 bool DISubrange::Verify() const {
606 return isSubrange() && DbgNode->getNumOperands() == 3;
609 /// \brief Verify that the lexical block descriptor is well formed.
610 bool DILexicalBlock::Verify() const {
611 return isLexicalBlock() && DbgNode->getNumOperands() == 6;
614 /// \brief Verify that the file-scoped lexical block descriptor is well formed.
615 bool DILexicalBlockFile::Verify() const {
616 return isLexicalBlockFile() && DbgNode->getNumOperands() == 3;
619 /// \brief Verify that the template type parameter descriptor is well formed.
620 bool DITemplateTypeParameter::Verify() const {
621 return isTemplateTypeParameter() && DbgNode->getNumOperands() == 7;
624 /// \brief Verify that the template value parameter descriptor is well formed.
625 bool DITemplateValueParameter::Verify() const {
626 return isTemplateValueParameter() && DbgNode->getNumOperands() == 8;
629 /// \brief Verify that the imported module descriptor is well formed.
630 bool DIImportedEntity::Verify() const {
631 return isImportedEntity() &&
632 (DbgNode->getNumOperands() == 4 || DbgNode->getNumOperands() == 5);
635 /// getOriginalTypeSize - If this type is derived from a base type then
636 /// return base type size.
637 uint64_t DIDerivedType::getOriginalTypeSize() const {
638 uint16_t Tag = getTag();
640 if (Tag != dwarf::DW_TAG_member && Tag != dwarf::DW_TAG_typedef &&
641 Tag != dwarf::DW_TAG_const_type && Tag != dwarf::DW_TAG_volatile_type &&
642 Tag != dwarf::DW_TAG_restrict_type)
643 return getSizeInBits();
645 DIType BaseType = getTypeDerivedFrom();
647 // If this type is not derived from any type then take conservative approach.
648 if (!BaseType.isValid())
649 return getSizeInBits();
651 // If this is a derived type, go ahead and get the base type, unless it's a
652 // reference then it's just the size of the field. Pointer types have no need
653 // of this since they're a different type of qualification on the type.
654 if (BaseType.getTag() == dwarf::DW_TAG_reference_type ||
655 BaseType.getTag() == dwarf::DW_TAG_rvalue_reference_type)
656 return getSizeInBits();
658 if (BaseType.isDerivedType())
659 return DIDerivedType(BaseType).getOriginalTypeSize();
661 return BaseType.getSizeInBits();
664 /// getObjCProperty - Return property node, if this ivar is associated with one.
665 MDNode *DIDerivedType::getObjCProperty() const {
666 return getNodeField(DbgNode, 10);
669 MDString *DICompositeType::getIdentifier() const {
670 return cast_or_null<MDString>(getField(DbgNode, 14));
674 static void VerifySubsetOf(const MDNode *LHS, const MDNode *RHS) {
675 for (unsigned i = 0; i != LHS->getNumOperands(); ++i) {
676 // Skip the 'empty' list (that's a single i32 0, rather than truly empty).
677 if (i == 0 && isa<ConstantInt>(LHS->getOperand(i)))
679 const MDNode *E = cast<MDNode>(LHS->getOperand(i));
681 for (unsigned j = 0; !found && j != RHS->getNumOperands(); ++j)
682 found = E == RHS->getOperand(j);
683 assert(found && "Losing a member during member list replacement");
688 /// \brief Set the array of member DITypes.
689 void DICompositeType::setTypeArray(DIArray Elements, DIArray TParams) {
690 assert((!TParams || DbgNode->getNumOperands() == 15) &&
691 "If you're setting the template parameters this should include a slot "
693 TrackingVH<MDNode> N(*this);
696 // Check that the new list of members contains all the old members as well.
697 if (const MDNode *El = cast_or_null<MDNode>(N->getOperand(10)))
698 VerifySubsetOf(El, Elements);
700 N->replaceOperandWith(10, Elements);
703 N->replaceOperandWith(13, TParams);
707 void DICompositeType::addMember(DIDescriptor D) {
708 SmallVector<llvm::Value *, 16> M;
709 DIArray OrigM = getTypeArray();
710 unsigned Elements = OrigM.getNumElements();
711 if (Elements == 1 && !OrigM.getElement(0))
713 M.reserve(Elements + 1);
714 for (unsigned i = 0; i != Elements; ++i)
715 M.push_back(OrigM.getElement(i));
717 setTypeArray(DIArray(MDNode::get(DbgNode->getContext(), M)));
720 /// Generate a reference to this DIType. Uses the type identifier instead
721 /// of the actual MDNode if possible, to help type uniquing.
722 Value *DIScope::generateRef() {
723 if (!isCompositeType())
725 DICompositeType DTy(DbgNode);
726 if (!DTy.getIdentifier())
728 return DTy.getIdentifier();
731 /// \brief Set the containing type.
732 void DICompositeType::setContainingType(DICompositeType ContainingType) {
733 TrackingVH<MDNode> N(*this);
734 N->replaceOperandWith(12, ContainingType.generateRef());
738 /// isInlinedFnArgument - Return true if this variable provides debugging
739 /// information for an inlined function arguments.
740 bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
741 assert(CurFn && "Invalid function");
742 if (!getContext().isSubprogram())
744 // This variable is not inlined function argument if its scope
745 // does not describe current function.
746 return !DISubprogram(getContext()).describes(CurFn);
749 /// describes - Return true if this subprogram provides debugging
750 /// information for the function F.
751 bool DISubprogram::describes(const Function *F) {
752 assert(F && "Invalid function");
753 if (F == getFunction())
755 StringRef Name = getLinkageName();
758 if (F->getName() == Name)
763 unsigned DISubprogram::isOptimized() const {
764 assert (DbgNode && "Invalid subprogram descriptor!");
765 if (DbgNode->getNumOperands() == 15)
766 return getUnsignedField(14);
770 MDNode *DISubprogram::getVariablesNodes() const {
771 return getNodeField(DbgNode, 18);
774 DIArray DISubprogram::getVariables() const {
775 return DIArray(getNodeField(DbgNode, 18));
778 Value *DITemplateValueParameter::getValue() const {
779 return getField(DbgNode, 4);
782 // If the current node has a parent scope then return that,
783 // else return an empty scope.
784 DIScope DIScope::getContext() const {
787 return DIType(DbgNode).getContext();
790 return DISubprogram(DbgNode).getContext();
792 if (isLexicalBlock())
793 return DILexicalBlock(DbgNode).getContext();
795 if (isLexicalBlockFile())
796 return DILexicalBlockFile(DbgNode).getContext();
799 return DINameSpace(DbgNode).getContext();
801 assert((isFile() || isCompileUnit()) && "Unhandled type of scope.");
805 StringRef DIScope::getFilename() const {
808 return ::getStringField(getNodeField(DbgNode, 1), 0);
811 StringRef DIScope::getDirectory() const {
814 return ::getStringField(getNodeField(DbgNode, 1), 1);
817 DIArray DICompileUnit::getEnumTypes() const {
818 if (!DbgNode || DbgNode->getNumOperands() < 13)
821 return DIArray(getNodeField(DbgNode, 7));
824 DIArray DICompileUnit::getRetainedTypes() const {
825 if (!DbgNode || DbgNode->getNumOperands() < 13)
828 return DIArray(getNodeField(DbgNode, 8));
831 DIArray DICompileUnit::getSubprograms() const {
832 if (!DbgNode || DbgNode->getNumOperands() < 13)
835 return DIArray(getNodeField(DbgNode, 9));
839 DIArray DICompileUnit::getGlobalVariables() const {
840 if (!DbgNode || DbgNode->getNumOperands() < 13)
843 return DIArray(getNodeField(DbgNode, 10));
846 DIArray DICompileUnit::getImportedEntities() const {
847 if (!DbgNode || DbgNode->getNumOperands() < 13)
850 return DIArray(getNodeField(DbgNode, 11));
853 /// fixupSubprogramName - Replace contains special characters used
854 /// in a typical Objective-C names with '.' in a given string.
855 static void fixupSubprogramName(DISubprogram Fn, SmallVectorImpl<char> &Out) {
857 Fn.getFunction() ? Fn.getFunction()->getName() : Fn.getName();
858 FName = Function::getRealLinkageName(FName);
860 StringRef Prefix("llvm.dbg.lv.");
861 Out.reserve(FName.size() + Prefix.size());
862 Out.append(Prefix.begin(), Prefix.end());
864 bool isObjCLike = false;
865 for (size_t i = 0, e = FName.size(); i < e; ++i) {
870 if (isObjCLike && (C == '[' || C == ']' || C == ' ' || C == ':' ||
871 C == '+' || C == '(' || C == ')'))
878 /// getFnSpecificMDNode - Return a NameMDNode, if available, that is
879 /// suitable to hold function specific information.
880 NamedMDNode *llvm::getFnSpecificMDNode(const Module &M, DISubprogram Fn) {
881 SmallString<32> Name;
882 fixupSubprogramName(Fn, Name);
883 return M.getNamedMetadata(Name.str());
886 /// getOrInsertFnSpecificMDNode - Return a NameMDNode that is suitable
887 /// to hold function specific information.
888 NamedMDNode *llvm::getOrInsertFnSpecificMDNode(Module &M, DISubprogram Fn) {
889 SmallString<32> Name;
890 fixupSubprogramName(Fn, Name);
891 return M.getOrInsertNamedMetadata(Name.str());
894 /// createInlinedVariable - Create a new inlined variable based on current
896 /// @param DV Current Variable.
897 /// @param InlinedScope Location at current variable is inlined.
898 DIVariable llvm::createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
899 LLVMContext &VMContext) {
900 SmallVector<Value *, 16> Elts;
901 // Insert inlined scope as 7th element.
902 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
903 i == 7 ? Elts.push_back(InlinedScope) :
904 Elts.push_back(DV->getOperand(i));
905 return DIVariable(MDNode::get(VMContext, Elts));
908 /// cleanseInlinedVariable - Remove inlined scope from the variable.
909 DIVariable llvm::cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext) {
910 SmallVector<Value *, 16> Elts;
911 // Insert inlined scope as 7th element.
912 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
914 Elts.push_back(Constant::getNullValue(Type::getInt32Ty(VMContext))):
915 Elts.push_back(DV->getOperand(i));
916 return DIVariable(MDNode::get(VMContext, Elts));
919 /// getDISubprogram - Find subprogram that is enclosing this scope.
920 DISubprogram llvm::getDISubprogram(const MDNode *Scope) {
921 DIDescriptor D(Scope);
922 if (D.isSubprogram())
923 return DISubprogram(Scope);
925 if (D.isLexicalBlockFile())
926 return getDISubprogram(DILexicalBlockFile(Scope).getContext());
928 if (D.isLexicalBlock())
929 return getDISubprogram(DILexicalBlock(Scope).getContext());
931 return DISubprogram();
934 /// getDICompositeType - Find underlying composite type.
935 DICompositeType llvm::getDICompositeType(DIType T) {
936 if (T.isCompositeType())
937 return DICompositeType(T);
939 if (T.isDerivedType())
940 return getDICompositeType(DIDerivedType(T).getTypeDerivedFrom());
942 return DICompositeType();
945 /// isSubprogramContext - Return true if Context is either a subprogram
946 /// or another context nested inside a subprogram.
947 bool llvm::isSubprogramContext(const MDNode *Context) {
950 DIDescriptor D(Context);
951 if (D.isSubprogram())
954 return isSubprogramContext(DIType(Context).getContext());
958 /// Update DITypeIdentifierMap by going through retained types of each CU.
959 DITypeIdentifierMap llvm::generateDITypeIdentifierMap(
960 const NamedMDNode *CU_Nodes) {
961 DITypeIdentifierMap Map;
962 for (unsigned CUi = 0, CUe = CU_Nodes->getNumOperands(); CUi != CUe; ++CUi) {
963 DICompileUnit CU(CU_Nodes->getOperand(CUi));
964 DIArray Retain = CU.getRetainedTypes();
965 for (unsigned Ti = 0, Te = Retain.getNumElements(); Ti != Te; ++Ti) {
966 if (!Retain.getElement(Ti).isCompositeType())
968 DICompositeType Ty(Retain.getElement(Ti));
969 if (MDString *TypeId = Ty.getIdentifier()) {
970 // Definition has priority over declaration.
971 // Try to insert (TypeId, Ty) to Map.
972 std::pair<DITypeIdentifierMap::iterator, bool> P =
973 Map.insert(std::make_pair(TypeId, Ty));
974 // If TypeId already exists in Map and this is a definition, replace
975 // whatever we had (declaration or definition) with the definition.
976 if (!P.second && !Ty.isForwardDecl())
977 P.first->second = Ty;
984 //===----------------------------------------------------------------------===//
985 // DebugInfoFinder implementations.
986 //===----------------------------------------------------------------------===//
988 void DebugInfoFinder::reset() {
997 /// processModule - Process entire module and collect debug info.
998 void DebugInfoFinder::processModule(const Module &M) {
999 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
1000 for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
1001 DICompileUnit CU(CU_Nodes->getOperand(i));
1003 DIArray GVs = CU.getGlobalVariables();
1004 for (unsigned i = 0, e = GVs.getNumElements(); i != e; ++i) {
1005 DIGlobalVariable DIG(GVs.getElement(i));
1006 if (addGlobalVariable(DIG)) {
1007 processScope(DIG.getContext());
1008 processType(DIG.getType());
1011 DIArray SPs = CU.getSubprograms();
1012 for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i)
1013 processSubprogram(DISubprogram(SPs.getElement(i)));
1014 DIArray EnumTypes = CU.getEnumTypes();
1015 for (unsigned i = 0, e = EnumTypes.getNumElements(); i != e; ++i)
1016 processType(DIType(EnumTypes.getElement(i)));
1017 DIArray RetainedTypes = CU.getRetainedTypes();
1018 for (unsigned i = 0, e = RetainedTypes.getNumElements(); i != e; ++i)
1019 processType(DIType(RetainedTypes.getElement(i)));
1020 DIArray Imports = CU.getImportedEntities();
1021 for (unsigned i = 0, e = Imports.getNumElements(); i != e; ++i) {
1022 DIImportedEntity Import = DIImportedEntity(
1023 Imports.getElement(i));
1024 DIDescriptor Entity = Import.getEntity();
1025 if (Entity.isType())
1026 processType(DIType(Entity));
1027 else if (Entity.isSubprogram())
1028 processSubprogram(DISubprogram(Entity));
1029 else if (Entity.isNameSpace())
1030 processScope(DINameSpace(Entity).getContext());
1032 // FIXME: We really shouldn't be bailing out after visiting just one CU
1038 /// processLocation - Process DILocation.
1039 void DebugInfoFinder::processLocation(DILocation Loc) {
1041 processScope(Loc.getScope());
1042 processLocation(Loc.getOrigLocation());
1045 /// processType - Process DIType.
1046 void DebugInfoFinder::processType(DIType DT) {
1049 processScope(DT.getContext());
1050 if (DT.isCompositeType()) {
1051 DICompositeType DCT(DT);
1052 processType(DCT.getTypeDerivedFrom());
1053 DIArray DA = DCT.getTypeArray();
1054 for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
1055 DIDescriptor D = DA.getElement(i);
1057 processType(DIType(D));
1058 else if (D.isSubprogram())
1059 processSubprogram(DISubprogram(D));
1061 } else if (DT.isDerivedType()) {
1062 DIDerivedType DDT(DT);
1063 processType(DDT.getTypeDerivedFrom());
1067 void DebugInfoFinder::processScope(DIScope Scope) {
1068 if (Scope.isType()) {
1073 if (Scope.isCompileUnit()) {
1074 addCompileUnit(DICompileUnit(Scope));
1077 if (Scope.isSubprogram()) {
1078 processSubprogram(DISubprogram(Scope));
1081 if (!addScope(Scope))
1083 if (Scope.isLexicalBlock()) {
1084 DILexicalBlock LB(Scope);
1085 processScope(LB.getContext());
1086 } else if (Scope.isLexicalBlockFile()) {
1087 DILexicalBlockFile LBF = DILexicalBlockFile(Scope);
1088 processScope(LBF.getScope());
1089 } else if (Scope.isNameSpace()) {
1090 DINameSpace NS(Scope);
1091 processScope(NS.getContext());
1095 /// processLexicalBlock
1096 void DebugInfoFinder::processLexicalBlock(DILexicalBlock LB) {
1097 DIScope Context = LB.getContext();
1098 if (Context.isLexicalBlock())
1099 return processLexicalBlock(DILexicalBlock(Context));
1100 else if (Context.isLexicalBlockFile()) {
1101 DILexicalBlockFile DBF = DILexicalBlockFile(Context);
1102 return processLexicalBlock(DILexicalBlock(DBF.getScope()));
1105 return processSubprogram(DISubprogram(Context));
1108 /// processSubprogram - Process DISubprogram.
1109 void DebugInfoFinder::processSubprogram(DISubprogram SP) {
1110 if (!addSubprogram(SP))
1112 processScope(SP.getContext());
1113 processType(SP.getType());
1114 DIArray TParams = SP.getTemplateParams();
1115 for (unsigned I = 0, E = TParams.getNumElements(); I != E; ++I) {
1116 DIDescriptor Element = TParams.getElement(I);
1117 if (Element.isTemplateTypeParameter()) {
1118 DITemplateTypeParameter TType(Element);
1119 processScope(TType.getContext());
1120 processType(TType.getType());
1121 } else if (Element.isTemplateValueParameter()) {
1122 DITemplateValueParameter TVal(Element);
1123 processScope(TVal.getContext());
1124 processType(TVal.getType());
1129 /// processDeclare - Process DbgDeclareInst.
1130 void DebugInfoFinder::processDeclare(const DbgDeclareInst *DDI) {
1131 MDNode *N = dyn_cast<MDNode>(DDI->getVariable());
1135 if (!DV.isVariable())
1138 if (!NodesSeen.insert(DV))
1140 processScope(DIVariable(N).getContext());
1141 processType(DIVariable(N).getType());
1144 void DebugInfoFinder::processValue(const DbgValueInst *DVI) {
1145 MDNode *N = dyn_cast<MDNode>(DVI->getVariable());
1149 if (!DV.isVariable())
1152 if (!NodesSeen.insert(DV))
1154 processScope(DIVariable(N).getContext());
1155 processType(DIVariable(N).getType());
1158 /// addType - Add type into Tys.
1159 bool DebugInfoFinder::addType(DIType DT) {
1163 if (!NodesSeen.insert(DT))
1170 /// addCompileUnit - Add compile unit into CUs.
1171 bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
1174 if (!NodesSeen.insert(CU))
1181 /// addGlobalVariable - Add global variable into GVs.
1182 bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
1186 if (!NodesSeen.insert(DIG))
1193 // addSubprogram - Add subprgoram into SPs.
1194 bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
1198 if (!NodesSeen.insert(SP))
1205 bool DebugInfoFinder::addScope(DIScope Scope) {
1208 // FIXME: Ocaml binding generates a scope with no content, we treat it
1210 if (Scope->getNumOperands() == 0)
1212 if (!NodesSeen.insert(Scope))
1214 Scopes.push_back(Scope);
1218 //===----------------------------------------------------------------------===//
1219 // DIDescriptor: dump routines for all descriptors.
1220 //===----------------------------------------------------------------------===//
1222 /// dump - Print descriptor to dbgs() with a newline.
1223 void DIDescriptor::dump() const {
1224 print(dbgs()); dbgs() << '\n';
1227 /// print - Print descriptor.
1228 void DIDescriptor::print(raw_ostream &OS) const {
1229 if (!DbgNode) return;
1231 if (const char *Tag = dwarf::TagString(getTag()))
1232 OS << "[ " << Tag << " ]";
1234 if (this->isSubrange()) {
1235 DISubrange(DbgNode).printInternal(OS);
1236 } else if (this->isCompileUnit()) {
1237 DICompileUnit(DbgNode).printInternal(OS);
1238 } else if (this->isFile()) {
1239 DIFile(DbgNode).printInternal(OS);
1240 } else if (this->isEnumerator()) {
1241 DIEnumerator(DbgNode).printInternal(OS);
1242 } else if (this->isBasicType()) {
1243 DIType(DbgNode).printInternal(OS);
1244 } else if (this->isDerivedType()) {
1245 DIDerivedType(DbgNode).printInternal(OS);
1246 } else if (this->isCompositeType()) {
1247 DICompositeType(DbgNode).printInternal(OS);
1248 } else if (this->isSubprogram()) {
1249 DISubprogram(DbgNode).printInternal(OS);
1250 } else if (this->isGlobalVariable()) {
1251 DIGlobalVariable(DbgNode).printInternal(OS);
1252 } else if (this->isVariable()) {
1253 DIVariable(DbgNode).printInternal(OS);
1254 } else if (this->isObjCProperty()) {
1255 DIObjCProperty(DbgNode).printInternal(OS);
1256 } else if (this->isNameSpace()) {
1257 DINameSpace(DbgNode).printInternal(OS);
1258 } else if (this->isScope()) {
1259 DIScope(DbgNode).printInternal(OS);
1263 void DISubrange::printInternal(raw_ostream &OS) const {
1264 int64_t Count = getCount();
1266 OS << " [" << getLo() << ", " << Count - 1 << ']';
1268 OS << " [unbounded]";
1271 void DIScope::printInternal(raw_ostream &OS) const {
1272 OS << " [" << getDirectory() << "/" << getFilename() << ']';
1275 void DICompileUnit::printInternal(raw_ostream &OS) const {
1276 DIScope::printInternal(OS);
1278 unsigned Lang = getLanguage();
1279 if (const char *LangStr = dwarf::LanguageString(Lang))
1282 (OS << "lang 0x").write_hex(Lang);
1286 void DIEnumerator::printInternal(raw_ostream &OS) const {
1287 OS << " [" << getName() << " :: " << getEnumValue() << ']';
1290 void DIType::printInternal(raw_ostream &OS) const {
1291 if (!DbgNode) return;
1293 StringRef Res = getName();
1295 OS << " [" << Res << "]";
1297 // TODO: Print context?
1299 OS << " [line " << getLineNumber()
1300 << ", size " << getSizeInBits()
1301 << ", align " << getAlignInBits()
1302 << ", offset " << getOffsetInBits();
1304 if (const char *Enc =
1305 dwarf::AttributeEncodingString(DIBasicType(DbgNode).getEncoding()))
1306 OS << ", enc " << Enc;
1311 else if (isProtected())
1312 OS << " [protected]";
1315 OS << " [artificial]";
1317 if (isForwardDecl())
1319 else if (getTag() == dwarf::DW_TAG_structure_type ||
1320 getTag() == dwarf::DW_TAG_union_type ||
1321 getTag() == dwarf::DW_TAG_enumeration_type ||
1322 getTag() == dwarf::DW_TAG_class_type)
1326 if (isStaticMember())
1330 void DIDerivedType::printInternal(raw_ostream &OS) const {
1331 DIType::printInternal(OS);
1332 OS << " [from " << getTypeDerivedFrom().getName() << ']';
1335 void DICompositeType::printInternal(raw_ostream &OS) const {
1336 DIType::printInternal(OS);
1337 DIArray A = getTypeArray();
1338 OS << " [" << A.getNumElements() << " elements]";
1341 void DINameSpace::printInternal(raw_ostream &OS) const {
1342 StringRef Name = getName();
1344 OS << " [" << Name << ']';
1346 OS << " [line " << getLineNumber() << ']';
1349 void DISubprogram::printInternal(raw_ostream &OS) const {
1350 // TODO : Print context
1351 OS << " [line " << getLineNumber() << ']';
1353 if (isLocalToUnit())
1359 if (getScopeLineNumber() != getLineNumber())
1360 OS << " [scope " << getScopeLineNumber() << "]";
1364 else if (isProtected())
1365 OS << " [protected]";
1367 StringRef Res = getName();
1369 OS << " [" << Res << ']';
1372 void DIGlobalVariable::printInternal(raw_ostream &OS) const {
1373 StringRef Res = getName();
1375 OS << " [" << Res << ']';
1377 OS << " [line " << getLineNumber() << ']';
1379 // TODO : Print context
1381 if (isLocalToUnit())
1388 void DIVariable::printInternal(raw_ostream &OS) const {
1389 StringRef Res = getName();
1391 OS << " [" << Res << ']';
1393 OS << " [line " << getLineNumber() << ']';
1396 void DIObjCProperty::printInternal(raw_ostream &OS) const {
1397 StringRef Name = getObjCPropertyName();
1399 OS << " [" << Name << ']';
1401 OS << " [line " << getLineNumber()
1402 << ", properties " << getUnsignedField(6) << ']';
1405 static void printDebugLoc(DebugLoc DL, raw_ostream &CommentOS,
1406 const LLVMContext &Ctx) {
1407 if (!DL.isUnknown()) { // Print source line info.
1408 DIScope Scope(DL.getScope(Ctx));
1409 assert(Scope.isScope() &&
1410 "Scope of a DebugLoc should be a DIScope.");
1411 // Omit the directory, because it's likely to be long and uninteresting.
1412 CommentOS << Scope.getFilename();
1413 CommentOS << ':' << DL.getLine();
1414 if (DL.getCol() != 0)
1415 CommentOS << ':' << DL.getCol();
1416 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(DL.getInlinedAt(Ctx));
1417 if (!InlinedAtDL.isUnknown()) {
1418 CommentOS << " @[ ";
1419 printDebugLoc(InlinedAtDL, CommentOS, Ctx);
1425 void DIVariable::printExtendedName(raw_ostream &OS) const {
1426 const LLVMContext &Ctx = DbgNode->getContext();
1427 StringRef Res = getName();
1429 OS << Res << "," << getLineNumber();
1430 if (MDNode *InlinedAt = getInlinedAt()) {
1431 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(InlinedAt);
1432 if (!InlinedAtDL.isUnknown()) {
1434 printDebugLoc(InlinedAtDL, OS, Ctx);
1440 DIScopeRef::DIScopeRef(const Value *V) : Val(V) {
1441 assert(isScopeRef(V) && "DIScopeRef should be a MDString or MDNode");
1444 /// Given a DITypeIdentifierMap, tries to find the corresponding
1445 /// DIScope for a DIScopeRef.
1446 DIScope DIScopeRef::resolve(const DITypeIdentifierMap &Map) const {
1450 if (const MDNode *MD = dyn_cast<MDNode>(Val))
1453 const MDString *MS = cast<MDString>(Val);
1454 // Find the corresponding MDNode.
1455 DITypeIdentifierMap::const_iterator Iter = Map.find(MS);
1456 assert(Iter != Map.end() && "Identifier not in the type map?");
1457 assert(DIType(Iter->second).isType() &&
1458 "MDNode in DITypeIdentifierMap should be a DIType.");
1459 return DIScope(Iter->second);
1462 /// Specialize getFieldAs to handle fields that are references to DIScopes.
1464 DIScopeRef DIDescriptor::getFieldAs<DIScopeRef>(unsigned Elt) const {
1465 return DIScopeRef(getField(DbgNode, Elt));