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 /// Check if a field at position Elt of a MDNode can be a ScopeRef.
450 static bool fieldIsScopeRef(const MDNode *DbgNode, unsigned Elt) {
451 Value *Fld = getField(DbgNode, Elt);
452 return isScopeRef(Fld);
455 /// Verify - Verify that a type descriptor is well formed.
456 bool DIType::Verify() const {
459 // Make sure Context @ field 2 is MDNode.
460 if (!fieldIsScopeRef(DbgNode, 2))
463 // FIXME: Sink this into the various subclass verifies.
464 uint16_t Tag = getTag();
465 if (!isBasicType() && Tag != dwarf::DW_TAG_const_type &&
466 Tag != dwarf::DW_TAG_volatile_type && Tag != dwarf::DW_TAG_pointer_type &&
467 Tag != dwarf::DW_TAG_ptr_to_member_type &&
468 Tag != dwarf::DW_TAG_reference_type &&
469 Tag != dwarf::DW_TAG_rvalue_reference_type &&
470 Tag != dwarf::DW_TAG_restrict_type && Tag != dwarf::DW_TAG_array_type &&
471 Tag != dwarf::DW_TAG_enumeration_type &&
472 Tag != dwarf::DW_TAG_subroutine_type &&
473 Tag != dwarf::DW_TAG_inheritance && Tag != dwarf::DW_TAG_friend &&
474 getFilename().empty())
476 // DIType is abstract, it should be a BasicType, a DerivedType or
479 DIBasicType(DbgNode).Verify();
480 else if (isCompositeType())
481 DICompositeType(DbgNode).Verify();
482 else if (isDerivedType())
483 DIDerivedType(DbgNode).Verify();
489 /// Verify - Verify that a basic type descriptor is well formed.
490 bool DIBasicType::Verify() const {
491 return isBasicType() && DbgNode->getNumOperands() == 10;
494 /// Verify - Verify that a derived type descriptor is well formed.
495 bool DIDerivedType::Verify() const {
496 // Make sure DerivedFrom @ field 9 is MDNode.
497 if (!fieldIsMDNode(DbgNode, 9))
499 if (getTag() == dwarf::DW_TAG_ptr_to_member_type)
500 // Make sure ClassType @ field 10 is a TypeRef.
501 if (!fieldIsTypeRef(DbgNode, 10))
504 return isDerivedType() && DbgNode->getNumOperands() >= 10 &&
505 DbgNode->getNumOperands() <= 14;
508 /// Verify - Verify that a composite type descriptor is well formed.
509 bool DICompositeType::Verify() const {
510 if (!isCompositeType())
513 // Make sure DerivedFrom @ field 9 and ContainingType @ field 12 are MDNodes.
514 if (!fieldIsMDNode(DbgNode, 9))
516 if (!fieldIsTypeRef(DbgNode, 12))
519 // Make sure the type identifier at field 14 is MDString, it can be null.
520 if (!fieldIsMDString(DbgNode, 14))
523 // If this is an array type verify that we have a DIType in the derived type
524 // field as that's the type of our element.
525 if (getTag() == dwarf::DW_TAG_array_type)
526 if (!DIType(getTypeDerivedFrom()))
529 return DbgNode->getNumOperands() == 15;
532 /// Verify - Verify that a subprogram descriptor is well formed.
533 bool DISubprogram::Verify() const {
537 // Make sure context @ field 2 and type @ field 7 are MDNodes.
538 if (!fieldIsMDNode(DbgNode, 2))
540 if (!fieldIsMDNode(DbgNode, 7))
542 // Containing type @ field 12.
543 if (!fieldIsTypeRef(DbgNode, 12))
545 return DbgNode->getNumOperands() == 20;
548 /// Verify - Verify that a global variable descriptor is well formed.
549 bool DIGlobalVariable::Verify() const {
550 if (!isGlobalVariable())
553 if (getDisplayName().empty())
555 // Make sure context @ field 2 and type @ field 8 are MDNodes.
556 if (!fieldIsMDNode(DbgNode, 2))
558 if (!fieldIsMDNode(DbgNode, 8))
560 // Make sure StaticDataMemberDeclaration @ field 12 is MDNode.
561 if (!fieldIsMDNode(DbgNode, 12))
564 return DbgNode->getNumOperands() == 13;
567 /// Verify - Verify that a variable descriptor is well formed.
568 bool DIVariable::Verify() const {
572 // Make sure context @ field 1 and type @ field 5 are MDNodes.
573 if (!fieldIsMDNode(DbgNode, 1))
575 if (!fieldIsMDNode(DbgNode, 5))
577 return DbgNode->getNumOperands() >= 8;
580 /// Verify - Verify that a location descriptor is well formed.
581 bool DILocation::Verify() const {
585 return DbgNode->getNumOperands() == 4;
588 /// Verify - Verify that a namespace descriptor is well formed.
589 bool DINameSpace::Verify() const {
592 return DbgNode->getNumOperands() == 5;
595 /// \brief Retrieve the MDNode for the directory/file pair.
596 MDNode *DIFile::getFileNode() const {
597 return getNodeField(DbgNode, 1);
600 /// \brief Verify that the file descriptor is well formed.
601 bool DIFile::Verify() const {
602 return isFile() && DbgNode->getNumOperands() == 2;
605 /// \brief Verify that the enumerator descriptor is well formed.
606 bool DIEnumerator::Verify() const {
607 return isEnumerator() && DbgNode->getNumOperands() == 3;
610 /// \brief Verify that the subrange descriptor is well formed.
611 bool DISubrange::Verify() const {
612 return isSubrange() && DbgNode->getNumOperands() == 3;
615 /// \brief Verify that the lexical block descriptor is well formed.
616 bool DILexicalBlock::Verify() const {
617 return isLexicalBlock() && DbgNode->getNumOperands() == 6;
620 /// \brief Verify that the file-scoped lexical block descriptor is well formed.
621 bool DILexicalBlockFile::Verify() const {
622 return isLexicalBlockFile() && DbgNode->getNumOperands() == 3;
625 /// \brief Verify that the template type parameter descriptor is well formed.
626 bool DITemplateTypeParameter::Verify() const {
627 return isTemplateTypeParameter() && DbgNode->getNumOperands() == 7;
630 /// \brief Verify that the template value parameter descriptor is well formed.
631 bool DITemplateValueParameter::Verify() const {
632 return isTemplateValueParameter() && DbgNode->getNumOperands() == 8;
635 /// \brief Verify that the imported module descriptor is well formed.
636 bool DIImportedEntity::Verify() const {
637 return isImportedEntity() &&
638 (DbgNode->getNumOperands() == 4 || DbgNode->getNumOperands() == 5);
641 /// getOriginalTypeSize - If this type is derived from a base type then
642 /// return base type size.
643 uint64_t DIDerivedType::getOriginalTypeSize() const {
644 uint16_t Tag = getTag();
646 if (Tag != dwarf::DW_TAG_member && Tag != dwarf::DW_TAG_typedef &&
647 Tag != dwarf::DW_TAG_const_type && Tag != dwarf::DW_TAG_volatile_type &&
648 Tag != dwarf::DW_TAG_restrict_type)
649 return getSizeInBits();
651 DIType BaseType = getTypeDerivedFrom();
653 // If this type is not derived from any type then take conservative approach.
654 if (!BaseType.isValid())
655 return getSizeInBits();
657 // If this is a derived type, go ahead and get the base type, unless it's a
658 // reference then it's just the size of the field. Pointer types have no need
659 // of this since they're a different type of qualification on the type.
660 if (BaseType.getTag() == dwarf::DW_TAG_reference_type ||
661 BaseType.getTag() == dwarf::DW_TAG_rvalue_reference_type)
662 return getSizeInBits();
664 if (BaseType.isDerivedType())
665 return DIDerivedType(BaseType).getOriginalTypeSize();
667 return BaseType.getSizeInBits();
670 /// getObjCProperty - Return property node, if this ivar is associated with one.
671 MDNode *DIDerivedType::getObjCProperty() const {
672 return getNodeField(DbgNode, 10);
675 MDString *DICompositeType::getIdentifier() const {
676 return cast_or_null<MDString>(getField(DbgNode, 14));
680 static void VerifySubsetOf(const MDNode *LHS, const MDNode *RHS) {
681 for (unsigned i = 0; i != LHS->getNumOperands(); ++i) {
682 // Skip the 'empty' list (that's a single i32 0, rather than truly empty).
683 if (i == 0 && isa<ConstantInt>(LHS->getOperand(i)))
685 const MDNode *E = cast<MDNode>(LHS->getOperand(i));
687 for (unsigned j = 0; !found && j != RHS->getNumOperands(); ++j)
688 found = E == RHS->getOperand(j);
689 assert(found && "Losing a member during member list replacement");
694 /// \brief Set the array of member DITypes.
695 void DICompositeType::setTypeArray(DIArray Elements, DIArray TParams) {
696 assert((!TParams || DbgNode->getNumOperands() == 15) &&
697 "If you're setting the template parameters this should include a slot "
699 TrackingVH<MDNode> N(*this);
702 // Check that the new list of members contains all the old members as well.
703 if (const MDNode *El = cast_or_null<MDNode>(N->getOperand(10)))
704 VerifySubsetOf(El, Elements);
706 N->replaceOperandWith(10, Elements);
709 N->replaceOperandWith(13, TParams);
713 void DICompositeType::addMember(DIDescriptor D) {
714 SmallVector<llvm::Value *, 16> M;
715 DIArray OrigM = getTypeArray();
716 unsigned Elements = OrigM.getNumElements();
717 if (Elements == 1 && !OrigM.getElement(0))
719 M.reserve(Elements + 1);
720 for (unsigned i = 0; i != Elements; ++i)
721 M.push_back(OrigM.getElement(i));
723 setTypeArray(DIArray(MDNode::get(DbgNode->getContext(), M)));
726 /// Generate a reference to this DIType. Uses the type identifier instead
727 /// of the actual MDNode if possible, to help type uniquing.
728 DIScopeRef DIScope::getRef() const {
729 if (!isCompositeType())
730 return DIScopeRef(*this);
731 DICompositeType DTy(DbgNode);
732 if (!DTy.getIdentifier())
733 return DIScopeRef(*this);
734 return DIScopeRef(DTy.getIdentifier());
737 /// \brief Set the containing type.
738 void DICompositeType::setContainingType(DICompositeType ContainingType) {
739 TrackingVH<MDNode> N(*this);
740 N->replaceOperandWith(12, ContainingType.getRef());
744 /// isInlinedFnArgument - Return true if this variable provides debugging
745 /// information for an inlined function arguments.
746 bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
747 assert(CurFn && "Invalid function");
748 if (!getContext().isSubprogram())
750 // This variable is not inlined function argument if its scope
751 // does not describe current function.
752 return !DISubprogram(getContext()).describes(CurFn);
755 /// describes - Return true if this subprogram provides debugging
756 /// information for the function F.
757 bool DISubprogram::describes(const Function *F) {
758 assert(F && "Invalid function");
759 if (F == getFunction())
761 StringRef Name = getLinkageName();
764 if (F->getName() == Name)
769 unsigned DISubprogram::isOptimized() const {
770 assert (DbgNode && "Invalid subprogram descriptor!");
771 if (DbgNode->getNumOperands() == 15)
772 return getUnsignedField(14);
776 MDNode *DISubprogram::getVariablesNodes() const {
777 return getNodeField(DbgNode, 18);
780 DIArray DISubprogram::getVariables() const {
781 return DIArray(getNodeField(DbgNode, 18));
784 Value *DITemplateValueParameter::getValue() const {
785 return getField(DbgNode, 4);
788 // If the current node has a parent scope then return that,
789 // else return an empty scope.
790 DIScopeRef DIScope::getContext() const {
793 return DIType(DbgNode).getContext();
796 return DIScopeRef(DISubprogram(DbgNode).getContext());
798 if (isLexicalBlock())
799 return DIScopeRef(DILexicalBlock(DbgNode).getContext());
801 if (isLexicalBlockFile())
802 return DIScopeRef(DILexicalBlockFile(DbgNode).getContext());
805 return DIScopeRef(DINameSpace(DbgNode).getContext());
807 assert((isFile() || isCompileUnit()) && "Unhandled type of scope.");
808 return DIScopeRef(NULL);
811 StringRef DIScope::getFilename() const {
814 return ::getStringField(getNodeField(DbgNode, 1), 0);
817 StringRef DIScope::getDirectory() const {
820 return ::getStringField(getNodeField(DbgNode, 1), 1);
823 DIArray DICompileUnit::getEnumTypes() const {
824 if (!DbgNode || DbgNode->getNumOperands() < 13)
827 return DIArray(getNodeField(DbgNode, 7));
830 DIArray DICompileUnit::getRetainedTypes() const {
831 if (!DbgNode || DbgNode->getNumOperands() < 13)
834 return DIArray(getNodeField(DbgNode, 8));
837 DIArray DICompileUnit::getSubprograms() const {
838 if (!DbgNode || DbgNode->getNumOperands() < 13)
841 return DIArray(getNodeField(DbgNode, 9));
845 DIArray DICompileUnit::getGlobalVariables() const {
846 if (!DbgNode || DbgNode->getNumOperands() < 13)
849 return DIArray(getNodeField(DbgNode, 10));
852 DIArray DICompileUnit::getImportedEntities() const {
853 if (!DbgNode || DbgNode->getNumOperands() < 13)
856 return DIArray(getNodeField(DbgNode, 11));
859 /// fixupSubprogramName - Replace contains special characters used
860 /// in a typical Objective-C names with '.' in a given string.
861 static void fixupSubprogramName(DISubprogram Fn, SmallVectorImpl<char> &Out) {
863 Fn.getFunction() ? Fn.getFunction()->getName() : Fn.getName();
864 FName = Function::getRealLinkageName(FName);
866 StringRef Prefix("llvm.dbg.lv.");
867 Out.reserve(FName.size() + Prefix.size());
868 Out.append(Prefix.begin(), Prefix.end());
870 bool isObjCLike = false;
871 for (size_t i = 0, e = FName.size(); i < e; ++i) {
876 if (isObjCLike && (C == '[' || C == ']' || C == ' ' || C == ':' ||
877 C == '+' || C == '(' || C == ')'))
884 /// getFnSpecificMDNode - Return a NameMDNode, if available, that is
885 /// suitable to hold function specific information.
886 NamedMDNode *llvm::getFnSpecificMDNode(const Module &M, DISubprogram Fn) {
887 SmallString<32> Name;
888 fixupSubprogramName(Fn, Name);
889 return M.getNamedMetadata(Name.str());
892 /// getOrInsertFnSpecificMDNode - Return a NameMDNode that is suitable
893 /// to hold function specific information.
894 NamedMDNode *llvm::getOrInsertFnSpecificMDNode(Module &M, DISubprogram Fn) {
895 SmallString<32> Name;
896 fixupSubprogramName(Fn, Name);
897 return M.getOrInsertNamedMetadata(Name.str());
900 /// createInlinedVariable - Create a new inlined variable based on current
902 /// @param DV Current Variable.
903 /// @param InlinedScope Location at current variable is inlined.
904 DIVariable llvm::createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
905 LLVMContext &VMContext) {
906 SmallVector<Value *, 16> Elts;
907 // Insert inlined scope as 7th element.
908 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
909 i == 7 ? Elts.push_back(InlinedScope) :
910 Elts.push_back(DV->getOperand(i));
911 return DIVariable(MDNode::get(VMContext, Elts));
914 /// cleanseInlinedVariable - Remove inlined scope from the variable.
915 DIVariable llvm::cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext) {
916 SmallVector<Value *, 16> Elts;
917 // Insert inlined scope as 7th element.
918 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
920 Elts.push_back(Constant::getNullValue(Type::getInt32Ty(VMContext))):
921 Elts.push_back(DV->getOperand(i));
922 return DIVariable(MDNode::get(VMContext, Elts));
925 /// getDISubprogram - Find subprogram that is enclosing this scope.
926 DISubprogram llvm::getDISubprogram(const MDNode *Scope) {
927 DIDescriptor D(Scope);
928 if (D.isSubprogram())
929 return DISubprogram(Scope);
931 if (D.isLexicalBlockFile())
932 return getDISubprogram(DILexicalBlockFile(Scope).getContext());
934 if (D.isLexicalBlock())
935 return getDISubprogram(DILexicalBlock(Scope).getContext());
937 return DISubprogram();
940 /// getDICompositeType - Find underlying composite type.
941 DICompositeType llvm::getDICompositeType(DIType T) {
942 if (T.isCompositeType())
943 return DICompositeType(T);
945 if (T.isDerivedType())
946 return getDICompositeType(DIDerivedType(T).getTypeDerivedFrom());
948 return DICompositeType();
951 /// Update DITypeIdentifierMap by going through retained types of each CU.
952 DITypeIdentifierMap llvm::generateDITypeIdentifierMap(
953 const NamedMDNode *CU_Nodes) {
954 DITypeIdentifierMap Map;
955 for (unsigned CUi = 0, CUe = CU_Nodes->getNumOperands(); CUi != CUe; ++CUi) {
956 DICompileUnit CU(CU_Nodes->getOperand(CUi));
957 DIArray Retain = CU.getRetainedTypes();
958 for (unsigned Ti = 0, Te = Retain.getNumElements(); Ti != Te; ++Ti) {
959 if (!Retain.getElement(Ti).isCompositeType())
961 DICompositeType Ty(Retain.getElement(Ti));
962 if (MDString *TypeId = Ty.getIdentifier()) {
963 // Definition has priority over declaration.
964 // Try to insert (TypeId, Ty) to Map.
965 std::pair<DITypeIdentifierMap::iterator, bool> P =
966 Map.insert(std::make_pair(TypeId, Ty));
967 // If TypeId already exists in Map and this is a definition, replace
968 // whatever we had (declaration or definition) with the definition.
969 if (!P.second && !Ty.isForwardDecl())
970 P.first->second = Ty;
977 //===----------------------------------------------------------------------===//
978 // DebugInfoFinder implementations.
979 //===----------------------------------------------------------------------===//
981 void DebugInfoFinder::reset() {
988 TypeIdentifierMap.clear();
991 /// processModule - Process entire module and collect debug info.
992 void DebugInfoFinder::processModule(const Module &M) {
993 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
994 TypeIdentifierMap = generateDITypeIdentifierMap(CU_Nodes);
995 for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
996 DICompileUnit CU(CU_Nodes->getOperand(i));
998 DIArray GVs = CU.getGlobalVariables();
999 for (unsigned i = 0, e = GVs.getNumElements(); i != e; ++i) {
1000 DIGlobalVariable DIG(GVs.getElement(i));
1001 if (addGlobalVariable(DIG)) {
1002 processScope(DIG.getContext());
1003 processType(DIG.getType());
1006 DIArray SPs = CU.getSubprograms();
1007 for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i)
1008 processSubprogram(DISubprogram(SPs.getElement(i)));
1009 DIArray EnumTypes = CU.getEnumTypes();
1010 for (unsigned i = 0, e = EnumTypes.getNumElements(); i != e; ++i)
1011 processType(DIType(EnumTypes.getElement(i)));
1012 DIArray RetainedTypes = CU.getRetainedTypes();
1013 for (unsigned i = 0, e = RetainedTypes.getNumElements(); i != e; ++i)
1014 processType(DIType(RetainedTypes.getElement(i)));
1015 DIArray Imports = CU.getImportedEntities();
1016 for (unsigned i = 0, e = Imports.getNumElements(); i != e; ++i) {
1017 DIImportedEntity Import = DIImportedEntity(
1018 Imports.getElement(i));
1019 DIDescriptor Entity = Import.getEntity();
1020 if (Entity.isType())
1021 processType(DIType(Entity));
1022 else if (Entity.isSubprogram())
1023 processSubprogram(DISubprogram(Entity));
1024 else if (Entity.isNameSpace())
1025 processScope(DINameSpace(Entity).getContext());
1027 // FIXME: We really shouldn't be bailing out after visiting just one CU
1033 /// processLocation - Process DILocation.
1034 void DebugInfoFinder::processLocation(DILocation Loc) {
1036 processScope(Loc.getScope());
1037 processLocation(Loc.getOrigLocation());
1040 /// processType - Process DIType.
1041 void DebugInfoFinder::processType(DIType DT) {
1044 processScope(DT.getContext().resolve(TypeIdentifierMap));
1045 if (DT.isCompositeType()) {
1046 DICompositeType DCT(DT);
1047 processType(DCT.getTypeDerivedFrom());
1048 DIArray DA = DCT.getTypeArray();
1049 for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
1050 DIDescriptor D = DA.getElement(i);
1052 processType(DIType(D));
1053 else if (D.isSubprogram())
1054 processSubprogram(DISubprogram(D));
1056 } else if (DT.isDerivedType()) {
1057 DIDerivedType DDT(DT);
1058 processType(DDT.getTypeDerivedFrom());
1062 void DebugInfoFinder::processScope(DIScope Scope) {
1063 if (Scope.isType()) {
1068 if (Scope.isCompileUnit()) {
1069 addCompileUnit(DICompileUnit(Scope));
1072 if (Scope.isSubprogram()) {
1073 processSubprogram(DISubprogram(Scope));
1076 if (!addScope(Scope))
1078 if (Scope.isLexicalBlock()) {
1079 DILexicalBlock LB(Scope);
1080 processScope(LB.getContext());
1081 } else if (Scope.isLexicalBlockFile()) {
1082 DILexicalBlockFile LBF = DILexicalBlockFile(Scope);
1083 processScope(LBF.getScope());
1084 } else if (Scope.isNameSpace()) {
1085 DINameSpace NS(Scope);
1086 processScope(NS.getContext());
1090 /// processLexicalBlock
1091 void DebugInfoFinder::processLexicalBlock(DILexicalBlock LB) {
1092 DIScope Context = LB.getContext();
1093 if (Context.isLexicalBlock())
1094 return processLexicalBlock(DILexicalBlock(Context));
1095 else if (Context.isLexicalBlockFile()) {
1096 DILexicalBlockFile DBF = DILexicalBlockFile(Context);
1097 return processLexicalBlock(DILexicalBlock(DBF.getScope()));
1100 return processSubprogram(DISubprogram(Context));
1103 /// processSubprogram - Process DISubprogram.
1104 void DebugInfoFinder::processSubprogram(DISubprogram SP) {
1105 if (!addSubprogram(SP))
1107 processScope(SP.getContext());
1108 processType(SP.getType());
1109 DIArray TParams = SP.getTemplateParams();
1110 for (unsigned I = 0, E = TParams.getNumElements(); I != E; ++I) {
1111 DIDescriptor Element = TParams.getElement(I);
1112 if (Element.isTemplateTypeParameter()) {
1113 DITemplateTypeParameter TType(Element);
1114 processScope(TType.getContext());
1115 processType(TType.getType());
1116 } else if (Element.isTemplateValueParameter()) {
1117 DITemplateValueParameter TVal(Element);
1118 processScope(TVal.getContext());
1119 processType(TVal.getType());
1124 /// processDeclare - Process DbgDeclareInst.
1125 void DebugInfoFinder::processDeclare(const DbgDeclareInst *DDI) {
1126 MDNode *N = dyn_cast<MDNode>(DDI->getVariable());
1130 if (!DV.isVariable())
1133 if (!NodesSeen.insert(DV))
1135 processScope(DIVariable(N).getContext());
1136 processType(DIVariable(N).getType());
1139 void DebugInfoFinder::processValue(const DbgValueInst *DVI) {
1140 MDNode *N = dyn_cast<MDNode>(DVI->getVariable());
1144 if (!DV.isVariable())
1147 if (!NodesSeen.insert(DV))
1149 processScope(DIVariable(N).getContext());
1150 processType(DIVariable(N).getType());
1153 /// addType - Add type into Tys.
1154 bool DebugInfoFinder::addType(DIType DT) {
1158 if (!NodesSeen.insert(DT))
1165 /// addCompileUnit - Add compile unit into CUs.
1166 bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
1169 if (!NodesSeen.insert(CU))
1176 /// addGlobalVariable - Add global variable into GVs.
1177 bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
1181 if (!NodesSeen.insert(DIG))
1188 // addSubprogram - Add subprgoram into SPs.
1189 bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
1193 if (!NodesSeen.insert(SP))
1200 bool DebugInfoFinder::addScope(DIScope Scope) {
1203 // FIXME: Ocaml binding generates a scope with no content, we treat it
1205 if (Scope->getNumOperands() == 0)
1207 if (!NodesSeen.insert(Scope))
1209 Scopes.push_back(Scope);
1213 //===----------------------------------------------------------------------===//
1214 // DIDescriptor: dump routines for all descriptors.
1215 //===----------------------------------------------------------------------===//
1217 /// dump - Print descriptor to dbgs() with a newline.
1218 void DIDescriptor::dump() const {
1219 print(dbgs()); dbgs() << '\n';
1222 /// print - Print descriptor.
1223 void DIDescriptor::print(raw_ostream &OS) const {
1224 if (!DbgNode) return;
1226 if (const char *Tag = dwarf::TagString(getTag()))
1227 OS << "[ " << Tag << " ]";
1229 if (this->isSubrange()) {
1230 DISubrange(DbgNode).printInternal(OS);
1231 } else if (this->isCompileUnit()) {
1232 DICompileUnit(DbgNode).printInternal(OS);
1233 } else if (this->isFile()) {
1234 DIFile(DbgNode).printInternal(OS);
1235 } else if (this->isEnumerator()) {
1236 DIEnumerator(DbgNode).printInternal(OS);
1237 } else if (this->isBasicType()) {
1238 DIType(DbgNode).printInternal(OS);
1239 } else if (this->isDerivedType()) {
1240 DIDerivedType(DbgNode).printInternal(OS);
1241 } else if (this->isCompositeType()) {
1242 DICompositeType(DbgNode).printInternal(OS);
1243 } else if (this->isSubprogram()) {
1244 DISubprogram(DbgNode).printInternal(OS);
1245 } else if (this->isGlobalVariable()) {
1246 DIGlobalVariable(DbgNode).printInternal(OS);
1247 } else if (this->isVariable()) {
1248 DIVariable(DbgNode).printInternal(OS);
1249 } else if (this->isObjCProperty()) {
1250 DIObjCProperty(DbgNode).printInternal(OS);
1251 } else if (this->isNameSpace()) {
1252 DINameSpace(DbgNode).printInternal(OS);
1253 } else if (this->isScope()) {
1254 DIScope(DbgNode).printInternal(OS);
1258 void DISubrange::printInternal(raw_ostream &OS) const {
1259 int64_t Count = getCount();
1261 OS << " [" << getLo() << ", " << Count - 1 << ']';
1263 OS << " [unbounded]";
1266 void DIScope::printInternal(raw_ostream &OS) const {
1267 OS << " [" << getDirectory() << "/" << getFilename() << ']';
1270 void DICompileUnit::printInternal(raw_ostream &OS) const {
1271 DIScope::printInternal(OS);
1273 unsigned Lang = getLanguage();
1274 if (const char *LangStr = dwarf::LanguageString(Lang))
1277 (OS << "lang 0x").write_hex(Lang);
1281 void DIEnumerator::printInternal(raw_ostream &OS) const {
1282 OS << " [" << getName() << " :: " << getEnumValue() << ']';
1285 void DIType::printInternal(raw_ostream &OS) const {
1286 if (!DbgNode) return;
1288 StringRef Res = getName();
1290 OS << " [" << Res << "]";
1292 // TODO: Print context?
1294 OS << " [line " << getLineNumber()
1295 << ", size " << getSizeInBits()
1296 << ", align " << getAlignInBits()
1297 << ", offset " << getOffsetInBits();
1299 if (const char *Enc =
1300 dwarf::AttributeEncodingString(DIBasicType(DbgNode).getEncoding()))
1301 OS << ", enc " << Enc;
1306 else if (isProtected())
1307 OS << " [protected]";
1310 OS << " [artificial]";
1312 if (isForwardDecl())
1314 else if (getTag() == dwarf::DW_TAG_structure_type ||
1315 getTag() == dwarf::DW_TAG_union_type ||
1316 getTag() == dwarf::DW_TAG_enumeration_type ||
1317 getTag() == dwarf::DW_TAG_class_type)
1321 if (isStaticMember())
1325 void DIDerivedType::printInternal(raw_ostream &OS) const {
1326 DIType::printInternal(OS);
1327 OS << " [from " << getTypeDerivedFrom().getName() << ']';
1330 void DICompositeType::printInternal(raw_ostream &OS) const {
1331 DIType::printInternal(OS);
1332 DIArray A = getTypeArray();
1333 OS << " [" << A.getNumElements() << " elements]";
1336 void DINameSpace::printInternal(raw_ostream &OS) const {
1337 StringRef Name = getName();
1339 OS << " [" << Name << ']';
1341 OS << " [line " << getLineNumber() << ']';
1344 void DISubprogram::printInternal(raw_ostream &OS) const {
1345 // TODO : Print context
1346 OS << " [line " << getLineNumber() << ']';
1348 if (isLocalToUnit())
1354 if (getScopeLineNumber() != getLineNumber())
1355 OS << " [scope " << getScopeLineNumber() << "]";
1359 else if (isProtected())
1360 OS << " [protected]";
1362 StringRef Res = getName();
1364 OS << " [" << Res << ']';
1367 void DIGlobalVariable::printInternal(raw_ostream &OS) const {
1368 StringRef Res = getName();
1370 OS << " [" << Res << ']';
1372 OS << " [line " << getLineNumber() << ']';
1374 // TODO : Print context
1376 if (isLocalToUnit())
1383 void DIVariable::printInternal(raw_ostream &OS) const {
1384 StringRef Res = getName();
1386 OS << " [" << Res << ']';
1388 OS << " [line " << getLineNumber() << ']';
1391 void DIObjCProperty::printInternal(raw_ostream &OS) const {
1392 StringRef Name = getObjCPropertyName();
1394 OS << " [" << Name << ']';
1396 OS << " [line " << getLineNumber()
1397 << ", properties " << getUnsignedField(6) << ']';
1400 static void printDebugLoc(DebugLoc DL, raw_ostream &CommentOS,
1401 const LLVMContext &Ctx) {
1402 if (!DL.isUnknown()) { // Print source line info.
1403 DIScope Scope(DL.getScope(Ctx));
1404 assert(Scope.isScope() &&
1405 "Scope of a DebugLoc should be a DIScope.");
1406 // Omit the directory, because it's likely to be long and uninteresting.
1407 CommentOS << Scope.getFilename();
1408 CommentOS << ':' << DL.getLine();
1409 if (DL.getCol() != 0)
1410 CommentOS << ':' << DL.getCol();
1411 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(DL.getInlinedAt(Ctx));
1412 if (!InlinedAtDL.isUnknown()) {
1413 CommentOS << " @[ ";
1414 printDebugLoc(InlinedAtDL, CommentOS, Ctx);
1420 void DIVariable::printExtendedName(raw_ostream &OS) const {
1421 const LLVMContext &Ctx = DbgNode->getContext();
1422 StringRef Res = getName();
1424 OS << Res << "," << getLineNumber();
1425 if (MDNode *InlinedAt = getInlinedAt()) {
1426 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(InlinedAt);
1427 if (!InlinedAtDL.isUnknown()) {
1429 printDebugLoc(InlinedAtDL, OS, Ctx);
1435 /// Specialize constructor to make sure it has the correct type.
1437 DIRef<DIScope>::DIRef(const Value *V) : Val(V) {
1438 assert(isScopeRef(V) && "DIScopeRef should be a MDString or MDNode");
1441 DIRef<DIType>::DIRef(const Value *V) : Val(V) {
1442 assert(isTypeRef(V) && "DITypeRef should be a MDString or MDNode");
1445 /// Specialize getFieldAs to handle fields that are references to DIScopes.
1447 DIScopeRef DIDescriptor::getFieldAs<DIScopeRef>(unsigned Elt) const {
1448 return DIScopeRef(getField(DbgNode, Elt));
1450 /// Specialize getFieldAs to handle fields that are references to DITypes.
1452 DITypeRef DIDescriptor::getFieldAs<DITypeRef>(unsigned Elt) const {
1453 return DITypeRef(getField(DbgNode, Elt));