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 { return getNodeField(DbgNode, 7); }
146 //===----------------------------------------------------------------------===//
148 //===----------------------------------------------------------------------===//
150 /// isBasicType - Return true if the specified tag is legal for
152 bool DIDescriptor::isBasicType() const {
156 case dwarf::DW_TAG_base_type:
157 case dwarf::DW_TAG_unspecified_type:
164 /// isDerivedType - Return true if the specified tag is legal for DIDerivedType.
165 bool DIDescriptor::isDerivedType() const {
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 {
193 case dwarf::DW_TAG_array_type:
194 case dwarf::DW_TAG_structure_type:
195 case dwarf::DW_TAG_union_type:
196 case dwarf::DW_TAG_enumeration_type:
197 case dwarf::DW_TAG_subroutine_type:
198 case dwarf::DW_TAG_class_type:
205 /// isVariable - Return true if the specified tag is legal for DIVariable.
206 bool DIDescriptor::isVariable() const {
210 case dwarf::DW_TAG_auto_variable:
211 case dwarf::DW_TAG_arg_variable:
218 /// isType - Return true if the specified tag is legal for DIType.
219 bool DIDescriptor::isType() const {
220 return isBasicType() || isCompositeType() || isDerivedType();
223 /// isSubprogram - Return true if the specified tag is legal for
225 bool DIDescriptor::isSubprogram() const {
226 return DbgNode && getTag() == dwarf::DW_TAG_subprogram;
229 /// isGlobalVariable - Return true if the specified tag is legal for
230 /// DIGlobalVariable.
231 bool DIDescriptor::isGlobalVariable() const {
232 return DbgNode && (getTag() == dwarf::DW_TAG_variable ||
233 getTag() == dwarf::DW_TAG_constant);
236 /// isUnspecifiedParmeter - Return true if the specified tag is
237 /// DW_TAG_unspecified_parameters.
238 bool DIDescriptor::isUnspecifiedParameter() const {
239 return DbgNode && getTag() == dwarf::DW_TAG_unspecified_parameters;
242 /// isScope - Return true if the specified tag is one of the scope
244 bool DIDescriptor::isScope() const {
248 case dwarf::DW_TAG_compile_unit:
249 case dwarf::DW_TAG_lexical_block:
250 case dwarf::DW_TAG_subprogram:
251 case dwarf::DW_TAG_namespace:
252 case dwarf::DW_TAG_file_type:
260 /// isTemplateTypeParameter - Return true if the specified tag is
261 /// DW_TAG_template_type_parameter.
262 bool DIDescriptor::isTemplateTypeParameter() const {
263 return DbgNode && getTag() == dwarf::DW_TAG_template_type_parameter;
266 /// isTemplateValueParameter - Return true if the specified tag is
267 /// DW_TAG_template_value_parameter.
268 bool DIDescriptor::isTemplateValueParameter() const {
269 return DbgNode && (getTag() == dwarf::DW_TAG_template_value_parameter ||
270 getTag() == dwarf::DW_TAG_GNU_template_template_param ||
271 getTag() == dwarf::DW_TAG_GNU_template_parameter_pack);
274 /// isCompileUnit - Return true if the specified tag is DW_TAG_compile_unit.
275 bool DIDescriptor::isCompileUnit() const {
276 return DbgNode && getTag() == dwarf::DW_TAG_compile_unit;
279 /// isFile - Return true if the specified tag is DW_TAG_file_type.
280 bool DIDescriptor::isFile() const {
281 return DbgNode && getTag() == dwarf::DW_TAG_file_type;
284 /// isNameSpace - Return true if the specified tag is DW_TAG_namespace.
285 bool DIDescriptor::isNameSpace() const {
286 return DbgNode && getTag() == dwarf::DW_TAG_namespace;
289 /// isLexicalBlockFile - Return true if the specified descriptor is a
290 /// lexical block with an extra file.
291 bool DIDescriptor::isLexicalBlockFile() const {
292 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
293 (DbgNode->getNumOperands() == 3);
296 /// isLexicalBlock - Return true if the specified tag is DW_TAG_lexical_block.
297 bool DIDescriptor::isLexicalBlock() const {
298 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
299 (DbgNode->getNumOperands() > 3);
302 /// isSubrange - Return true if the specified tag is DW_TAG_subrange_type.
303 bool DIDescriptor::isSubrange() const {
304 return DbgNode && getTag() == dwarf::DW_TAG_subrange_type;
307 /// isEnumerator - Return true if the specified tag is DW_TAG_enumerator.
308 bool DIDescriptor::isEnumerator() const {
309 return DbgNode && getTag() == dwarf::DW_TAG_enumerator;
312 /// isObjCProperty - Return true if the specified tag is DW_TAG_APPLE_property.
313 bool DIDescriptor::isObjCProperty() const {
314 return DbgNode && getTag() == dwarf::DW_TAG_APPLE_property;
317 /// \brief Return true if the specified tag is DW_TAG_imported_module or
318 /// DW_TAG_imported_declaration.
319 bool DIDescriptor::isImportedEntity() const {
320 return DbgNode && (getTag() == dwarf::DW_TAG_imported_module ||
321 getTag() == dwarf::DW_TAG_imported_declaration);
324 //===----------------------------------------------------------------------===//
325 // Simple Descriptor Constructors and other Methods
326 //===----------------------------------------------------------------------===//
328 unsigned DIArray::getNumElements() const {
331 return DbgNode->getNumOperands();
334 /// replaceAllUsesWith - Replace all uses of the MDNode used by this
335 /// type with the one in the passed descriptor.
336 void DIType::replaceAllUsesWith(DIDescriptor &D) {
338 assert(DbgNode && "Trying to replace an unverified type!");
340 // Since we use a TrackingVH for the node, its easy for clients to manufacture
341 // legitimate situations where they want to replaceAllUsesWith() on something
342 // which, due to uniquing, has merged with the source. We shield clients from
343 // this detail by allowing a value to be replaced with replaceAllUsesWith()
346 MDNode *Node = const_cast<MDNode *>(DbgNode);
347 const MDNode *DN = D;
348 const Value *V = cast_or_null<Value>(DN);
349 Node->replaceAllUsesWith(const_cast<Value *>(V));
350 MDNode::deleteTemporary(Node);
354 /// replaceAllUsesWith - Replace all uses of the MDNode used by this
355 /// type with the one in D.
356 void DIType::replaceAllUsesWith(MDNode *D) {
358 assert(DbgNode && "Trying to replace an unverified type!");
360 // Since we use a TrackingVH for the node, its easy for clients to manufacture
361 // legitimate situations where they want to replaceAllUsesWith() on something
362 // which, due to uniquing, has merged with the source. We shield clients from
363 // this detail by allowing a value to be replaced with replaceAllUsesWith()
366 MDNode *Node = const_cast<MDNode *>(DbgNode);
367 const MDNode *DN = D;
368 const Value *V = cast_or_null<Value>(DN);
369 Node->replaceAllUsesWith(const_cast<Value *>(V));
370 MDNode::deleteTemporary(Node);
374 /// Verify - Verify that a compile unit is well formed.
375 bool DICompileUnit::Verify() const {
376 if (!isCompileUnit())
379 // Don't bother verifying the compilation directory or producer string
380 // as those could be empty.
381 if (getFilename().empty())
384 return DbgNode->getNumOperands() == 13;
387 /// Verify - Verify that an ObjC property is well formed.
388 bool DIObjCProperty::Verify() const {
389 if (!isObjCProperty())
392 // Don't worry about the rest of the strings for now.
393 return DbgNode->getNumOperands() == 8;
396 /// Check if a field at position Elt of a MDNode is a MDNode.
397 /// We currently allow an empty string and an integer.
398 /// But we don't allow a non-empty string in a MDNode field.
399 static bool fieldIsMDNode(const MDNode *DbgNode, unsigned Elt) {
400 // FIXME: This function should return true, if the field is null or the field
401 // is indeed a MDNode: return !Fld || isa<MDNode>(Fld).
402 Value *Fld = getField(DbgNode, Elt);
403 if (Fld && isa<MDString>(Fld) && !cast<MDString>(Fld)->getString().empty())
408 /// Check if a field at position Elt of a MDNode is a MDString.
409 static bool fieldIsMDString(const MDNode *DbgNode, unsigned Elt) {
410 Value *Fld = getField(DbgNode, Elt);
411 return !Fld || isa<MDString>(Fld);
414 /// Check if a value can be a reference to a type.
415 static bool isTypeRef(const Value *Val) {
417 (isa<MDString>(Val) && !cast<MDString>(Val)->getString().empty()) ||
418 (isa<MDNode>(Val) && DIType(cast<MDNode>(Val)).isType());
421 /// Check if a field at position Elt of a MDNode can be a reference to a type.
422 static bool fieldIsTypeRef(const MDNode *DbgNode, unsigned Elt) {
423 Value *Fld = getField(DbgNode, Elt);
424 return isTypeRef(Fld);
427 /// Check if a value can be a ScopeRef.
428 static bool isScopeRef(const Value *Val) {
430 (isa<MDString>(Val) && !cast<MDString>(Val)->getString().empty()) ||
431 (isa<MDNode>(Val) && DIScope(cast<MDNode>(Val)).isScope());
434 /// Check if a field at position Elt of a MDNode can be a ScopeRef.
435 static bool fieldIsScopeRef(const MDNode *DbgNode, unsigned Elt) {
436 Value *Fld = getField(DbgNode, Elt);
437 return isScopeRef(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 (!fieldIsScopeRef(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 return DIBasicType(DbgNode).Verify();
465 else if (isCompositeType())
466 return DICompositeType(DbgNode).Verify();
467 else if (isDerivedType())
468 return DIDerivedType(DbgNode).Verify();
473 /// Verify - Verify that a basic type descriptor is well formed.
474 bool DIBasicType::Verify() const {
475 return isBasicType() && DbgNode->getNumOperands() == 10;
478 /// Verify - Verify that a derived type descriptor is well formed.
479 bool DIDerivedType::Verify() const {
480 // Make sure DerivedFrom @ field 9 is TypeRef.
481 if (!fieldIsTypeRef(DbgNode, 9))
483 if (getTag() == dwarf::DW_TAG_ptr_to_member_type)
484 // Make sure ClassType @ field 10 is a TypeRef.
485 if (!fieldIsTypeRef(DbgNode, 10))
488 return isDerivedType() && DbgNode->getNumOperands() >= 10 &&
489 DbgNode->getNumOperands() <= 14;
492 /// Verify - Verify that a composite type descriptor is well formed.
493 bool DICompositeType::Verify() const {
494 if (!isCompositeType())
497 // Make sure DerivedFrom @ field 9 and ContainingType @ field 12 are TypeRef.
498 if (!fieldIsTypeRef(DbgNode, 9))
500 if (!fieldIsTypeRef(DbgNode, 12))
503 // Make sure the type identifier at field 14 is MDString, it can be null.
504 if (!fieldIsMDString(DbgNode, 14))
507 return DbgNode->getNumOperands() == 15;
510 /// Verify - Verify that a subprogram descriptor is well formed.
511 bool DISubprogram::Verify() const {
515 // Make sure context @ field 2 is a ScopeRef and type @ field 7 is a MDNode.
516 if (!fieldIsScopeRef(DbgNode, 2))
518 if (!fieldIsMDNode(DbgNode, 7))
520 // Containing type @ field 12.
521 if (!fieldIsTypeRef(DbgNode, 12))
523 return DbgNode->getNumOperands() == 20;
526 /// Verify - Verify that a global variable descriptor is well formed.
527 bool DIGlobalVariable::Verify() const {
528 if (!isGlobalVariable())
531 if (getDisplayName().empty())
533 // Make sure context @ field 2 and type @ field 8 are MDNodes.
534 if (!fieldIsMDNode(DbgNode, 2))
536 if (!fieldIsMDNode(DbgNode, 8))
538 // Make sure StaticDataMemberDeclaration @ field 12 is MDNode.
539 if (!fieldIsMDNode(DbgNode, 12))
542 return DbgNode->getNumOperands() == 13;
545 /// Verify - Verify that a variable descriptor is well formed.
546 bool DIVariable::Verify() const {
550 // Make sure context @ field 1 and type @ field 5 are MDNodes.
551 if (!fieldIsMDNode(DbgNode, 1))
553 if (!fieldIsMDNode(DbgNode, 5))
555 return DbgNode->getNumOperands() >= 8;
558 /// Verify - Verify that a location descriptor is well formed.
559 bool DILocation::Verify() const {
563 return DbgNode->getNumOperands() == 4;
566 /// Verify - Verify that a namespace descriptor is well formed.
567 bool DINameSpace::Verify() const {
570 return DbgNode->getNumOperands() == 5;
573 /// \brief Retrieve the MDNode for the directory/file pair.
574 MDNode *DIFile::getFileNode() const { return getNodeField(DbgNode, 1); }
576 /// \brief Verify that the file descriptor is well formed.
577 bool DIFile::Verify() const {
578 return isFile() && DbgNode->getNumOperands() == 2;
581 /// \brief Verify that the enumerator descriptor is well formed.
582 bool DIEnumerator::Verify() const {
583 return isEnumerator() && DbgNode->getNumOperands() == 3;
586 /// \brief Verify that the subrange descriptor is well formed.
587 bool DISubrange::Verify() const {
588 return isSubrange() && DbgNode->getNumOperands() == 3;
591 /// \brief Verify that the lexical block descriptor is well formed.
592 bool DILexicalBlock::Verify() const {
593 return isLexicalBlock() && DbgNode->getNumOperands() == 6;
596 /// \brief Verify that the file-scoped lexical block descriptor is well formed.
597 bool DILexicalBlockFile::Verify() const {
598 return isLexicalBlockFile() && DbgNode->getNumOperands() == 3;
601 /// \brief Verify that the template type parameter descriptor is well formed.
602 bool DITemplateTypeParameter::Verify() const {
603 return isTemplateTypeParameter() && DbgNode->getNumOperands() == 7;
606 /// \brief Verify that the template value parameter descriptor is well formed.
607 bool DITemplateValueParameter::Verify() const {
608 return isTemplateValueParameter() && DbgNode->getNumOperands() == 8;
611 /// \brief Verify that the imported module descriptor is well formed.
612 bool DIImportedEntity::Verify() const {
613 return isImportedEntity() &&
614 (DbgNode->getNumOperands() == 4 || DbgNode->getNumOperands() == 5);
617 /// getObjCProperty - Return property node, if this ivar is associated with one.
618 MDNode *DIDerivedType::getObjCProperty() const {
619 return getNodeField(DbgNode, 10);
622 MDString *DICompositeType::getIdentifier() const {
623 return cast_or_null<MDString>(getField(DbgNode, 14));
627 static void VerifySubsetOf(const MDNode *LHS, const MDNode *RHS) {
628 for (unsigned i = 0; i != LHS->getNumOperands(); ++i) {
629 // Skip the 'empty' list (that's a single i32 0, rather than truly empty).
630 if (i == 0 && isa<ConstantInt>(LHS->getOperand(i)))
632 const MDNode *E = cast<MDNode>(LHS->getOperand(i));
634 for (unsigned j = 0; !found && j != RHS->getNumOperands(); ++j)
635 found = E == RHS->getOperand(j);
636 assert(found && "Losing a member during member list replacement");
641 /// \brief Set the array of member DITypes.
642 void DICompositeType::setTypeArray(DIArray Elements, DIArray TParams) {
643 assert((!TParams || DbgNode->getNumOperands() == 15) &&
644 "If you're setting the template parameters this should include a slot "
646 TrackingVH<MDNode> N(*this);
649 // Check that the new list of members contains all the old members as well.
650 if (const MDNode *El = cast_or_null<MDNode>(N->getOperand(10)))
651 VerifySubsetOf(El, Elements);
653 N->replaceOperandWith(10, Elements);
656 N->replaceOperandWith(13, TParams);
660 void DICompositeType::addMember(DIDescriptor D) {
661 SmallVector<llvm::Value *, 16> M;
662 DIArray OrigM = getTypeArray();
663 unsigned Elements = OrigM.getNumElements();
664 if (Elements == 1 && !OrigM.getElement(0))
666 M.reserve(Elements + 1);
667 for (unsigned i = 0; i != Elements; ++i)
668 M.push_back(OrigM.getElement(i));
670 setTypeArray(DIArray(MDNode::get(DbgNode->getContext(), M)));
673 /// Generate a reference to this DIType. Uses the type identifier instead
674 /// of the actual MDNode if possible, to help type uniquing.
675 DIScopeRef DIScope::getRef() const {
676 if (!isCompositeType())
677 return DIScopeRef(*this);
678 DICompositeType DTy(DbgNode);
679 if (!DTy.getIdentifier())
680 return DIScopeRef(*this);
681 return DIScopeRef(DTy.getIdentifier());
684 /// \brief Set the containing type.
685 void DICompositeType::setContainingType(DICompositeType ContainingType) {
686 TrackingVH<MDNode> N(*this);
687 N->replaceOperandWith(12, ContainingType.getRef());
691 /// isInlinedFnArgument - Return true if this variable provides debugging
692 /// information for an inlined function arguments.
693 bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
694 assert(CurFn && "Invalid function");
695 if (!getContext().isSubprogram())
697 // This variable is not inlined function argument if its scope
698 // does not describe current function.
699 return !DISubprogram(getContext()).describes(CurFn);
702 /// describes - Return true if this subprogram provides debugging
703 /// information for the function F.
704 bool DISubprogram::describes(const Function *F) {
705 assert(F && "Invalid function");
706 if (F == getFunction())
708 StringRef Name = getLinkageName();
711 if (F->getName() == Name)
716 unsigned DISubprogram::isOptimized() const {
717 assert(DbgNode && "Invalid subprogram descriptor!");
718 if (DbgNode->getNumOperands() == 15)
719 return getUnsignedField(14);
723 MDNode *DISubprogram::getVariablesNodes() const {
724 return getNodeField(DbgNode, 18);
727 DIArray DISubprogram::getVariables() const {
728 return DIArray(getNodeField(DbgNode, 18));
731 Value *DITemplateValueParameter::getValue() const {
732 return getField(DbgNode, 4);
735 // If the current node has a parent scope then return that,
736 // else return an empty scope.
737 DIScopeRef DIScope::getContext() const {
740 return DIType(DbgNode).getContext();
743 return DIScopeRef(DISubprogram(DbgNode).getContext());
745 if (isLexicalBlock())
746 return DIScopeRef(DILexicalBlock(DbgNode).getContext());
748 if (isLexicalBlockFile())
749 return DIScopeRef(DILexicalBlockFile(DbgNode).getContext());
752 return DIScopeRef(DINameSpace(DbgNode).getContext());
754 assert((isFile() || isCompileUnit()) && "Unhandled type of scope.");
755 return DIScopeRef(NULL);
758 // If the scope node has a name, return that, else return an empty string.
759 StringRef DIScope::getName() const {
761 return DIType(DbgNode).getName();
763 return DISubprogram(DbgNode).getName();
765 return DINameSpace(DbgNode).getName();
766 assert((isLexicalBlock() || isLexicalBlockFile() || isFile() ||
768 "Unhandled type of scope.");
772 StringRef DIScope::getFilename() const {
775 return ::getStringField(getNodeField(DbgNode, 1), 0);
778 StringRef DIScope::getDirectory() const {
781 return ::getStringField(getNodeField(DbgNode, 1), 1);
784 DIArray DICompileUnit::getEnumTypes() const {
785 if (!DbgNode || DbgNode->getNumOperands() < 13)
788 return DIArray(getNodeField(DbgNode, 7));
791 DIArray DICompileUnit::getRetainedTypes() const {
792 if (!DbgNode || DbgNode->getNumOperands() < 13)
795 return DIArray(getNodeField(DbgNode, 8));
798 DIArray DICompileUnit::getSubprograms() const {
799 if (!DbgNode || DbgNode->getNumOperands() < 13)
802 return DIArray(getNodeField(DbgNode, 9));
805 DIArray DICompileUnit::getGlobalVariables() const {
806 if (!DbgNode || DbgNode->getNumOperands() < 13)
809 return DIArray(getNodeField(DbgNode, 10));
812 DIArray DICompileUnit::getImportedEntities() const {
813 if (!DbgNode || DbgNode->getNumOperands() < 13)
816 return DIArray(getNodeField(DbgNode, 11));
819 /// fixupSubprogramName - Replace contains special characters used
820 /// in a typical Objective-C names with '.' in a given string.
821 static void fixupSubprogramName(DISubprogram Fn, SmallVectorImpl<char> &Out) {
823 Fn.getFunction() ? Fn.getFunction()->getName() : Fn.getName();
824 FName = Function::getRealLinkageName(FName);
826 StringRef Prefix("llvm.dbg.lv.");
827 Out.reserve(FName.size() + Prefix.size());
828 Out.append(Prefix.begin(), Prefix.end());
830 bool isObjCLike = false;
831 for (size_t i = 0, e = FName.size(); i < e; ++i) {
836 if (isObjCLike && (C == '[' || C == ']' || C == ' ' || C == ':' ||
837 C == '+' || C == '(' || C == ')'))
844 /// getFnSpecificMDNode - Return a NameMDNode, if available, that is
845 /// suitable to hold function specific information.
846 NamedMDNode *llvm::getFnSpecificMDNode(const Module &M, DISubprogram Fn) {
847 SmallString<32> Name;
848 fixupSubprogramName(Fn, Name);
849 return M.getNamedMetadata(Name.str());
852 /// getOrInsertFnSpecificMDNode - Return a NameMDNode that is suitable
853 /// to hold function specific information.
854 NamedMDNode *llvm::getOrInsertFnSpecificMDNode(Module &M, DISubprogram Fn) {
855 SmallString<32> Name;
856 fixupSubprogramName(Fn, Name);
857 return M.getOrInsertNamedMetadata(Name.str());
860 /// createInlinedVariable - Create a new inlined variable based on current
862 /// @param DV Current Variable.
863 /// @param InlinedScope Location at current variable is inlined.
864 DIVariable llvm::createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
865 LLVMContext &VMContext) {
866 SmallVector<Value *, 16> Elts;
867 // Insert inlined scope as 7th element.
868 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
869 i == 7 ? Elts.push_back(InlinedScope) : Elts.push_back(DV->getOperand(i));
870 return DIVariable(MDNode::get(VMContext, Elts));
873 /// cleanseInlinedVariable - Remove inlined scope from the variable.
874 DIVariable llvm::cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext) {
875 SmallVector<Value *, 16> Elts;
876 // Insert inlined scope as 7th element.
877 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
878 i == 7 ? Elts.push_back(Constant::getNullValue(Type::getInt32Ty(VMContext)))
879 : Elts.push_back(DV->getOperand(i));
880 return DIVariable(MDNode::get(VMContext, Elts));
883 /// getDISubprogram - Find subprogram that is enclosing this scope.
884 DISubprogram llvm::getDISubprogram(const MDNode *Scope) {
885 DIDescriptor D(Scope);
886 if (D.isSubprogram())
887 return DISubprogram(Scope);
889 if (D.isLexicalBlockFile())
890 return getDISubprogram(DILexicalBlockFile(Scope).getContext());
892 if (D.isLexicalBlock())
893 return getDISubprogram(DILexicalBlock(Scope).getContext());
895 return DISubprogram();
898 /// getDICompositeType - Find underlying composite type.
899 DICompositeType llvm::getDICompositeType(DIType T) {
900 if (T.isCompositeType())
901 return DICompositeType(T);
903 if (T.isDerivedType()) {
904 // This function is currently used by dragonegg and dragonegg does
905 // not generate identifier for types, so using an empty map to resolve
906 // DerivedFrom should be fine.
907 DITypeIdentifierMap EmptyMap;
908 return getDICompositeType(
909 DIDerivedType(T).getTypeDerivedFrom().resolve(EmptyMap));
912 return DICompositeType();
915 /// Update DITypeIdentifierMap by going through retained types of each CU.
917 llvm::generateDITypeIdentifierMap(const NamedMDNode *CU_Nodes) {
918 DITypeIdentifierMap Map;
919 for (unsigned CUi = 0, CUe = CU_Nodes->getNumOperands(); CUi != CUe; ++CUi) {
920 DICompileUnit CU(CU_Nodes->getOperand(CUi));
921 DIArray Retain = CU.getRetainedTypes();
922 for (unsigned Ti = 0, Te = Retain.getNumElements(); Ti != Te; ++Ti) {
923 if (!Retain.getElement(Ti).isCompositeType())
925 DICompositeType Ty(Retain.getElement(Ti));
926 if (MDString *TypeId = Ty.getIdentifier()) {
927 // Definition has priority over declaration.
928 // Try to insert (TypeId, Ty) to Map.
929 std::pair<DITypeIdentifierMap::iterator, bool> P =
930 Map.insert(std::make_pair(TypeId, Ty));
931 // If TypeId already exists in Map and this is a definition, replace
932 // whatever we had (declaration or definition) with the definition.
933 if (!P.second && !Ty.isForwardDecl())
934 P.first->second = Ty;
941 //===----------------------------------------------------------------------===//
942 // DebugInfoFinder implementations.
943 //===----------------------------------------------------------------------===//
945 void DebugInfoFinder::reset() {
952 TypeIdentifierMap.clear();
953 TypeMapInitialized = false;
956 void DebugInfoFinder::InitializeTypeMap(const Module &M) {
957 if (!TypeMapInitialized)
958 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
959 TypeIdentifierMap = generateDITypeIdentifierMap(CU_Nodes);
960 TypeMapInitialized = true;
964 /// processModule - Process entire module and collect debug info.
965 void DebugInfoFinder::processModule(const Module &M) {
966 InitializeTypeMap(M);
967 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
968 for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
969 DICompileUnit CU(CU_Nodes->getOperand(i));
971 DIArray GVs = CU.getGlobalVariables();
972 for (unsigned i = 0, e = GVs.getNumElements(); i != e; ++i) {
973 DIGlobalVariable DIG(GVs.getElement(i));
974 if (addGlobalVariable(DIG)) {
975 processScope(DIG.getContext());
976 processType(DIG.getType());
979 DIArray SPs = CU.getSubprograms();
980 for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i)
981 processSubprogram(DISubprogram(SPs.getElement(i)));
982 DIArray EnumTypes = CU.getEnumTypes();
983 for (unsigned i = 0, e = EnumTypes.getNumElements(); i != e; ++i)
984 processType(DIType(EnumTypes.getElement(i)));
985 DIArray RetainedTypes = CU.getRetainedTypes();
986 for (unsigned i = 0, e = RetainedTypes.getNumElements(); i != e; ++i)
987 processType(DIType(RetainedTypes.getElement(i)));
988 DIArray Imports = CU.getImportedEntities();
989 for (unsigned i = 0, e = Imports.getNumElements(); i != e; ++i) {
990 DIImportedEntity Import = DIImportedEntity(Imports.getElement(i));
991 DIDescriptor Entity = Import.getEntity();
993 processType(DIType(Entity));
994 else if (Entity.isSubprogram())
995 processSubprogram(DISubprogram(Entity));
996 else if (Entity.isNameSpace())
997 processScope(DINameSpace(Entity).getContext());
1003 /// processLocation - Process DILocation.
1004 void DebugInfoFinder::processLocation(const Module &M, DILocation Loc) {
1007 InitializeTypeMap(M);
1008 processScope(Loc.getScope());
1009 processLocation(M, Loc.getOrigLocation());
1012 /// processType - Process DIType.
1013 void DebugInfoFinder::processType(DIType DT) {
1016 processScope(DT.getContext().resolve(TypeIdentifierMap));
1017 if (DT.isCompositeType()) {
1018 DICompositeType DCT(DT);
1019 processType(DCT.getTypeDerivedFrom().resolve(TypeIdentifierMap));
1020 DIArray DA = DCT.getTypeArray();
1021 for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
1022 DIDescriptor D = DA.getElement(i);
1024 processType(DIType(D));
1025 else if (D.isSubprogram())
1026 processSubprogram(DISubprogram(D));
1028 } else if (DT.isDerivedType()) {
1029 DIDerivedType DDT(DT);
1030 processType(DDT.getTypeDerivedFrom().resolve(TypeIdentifierMap));
1034 void DebugInfoFinder::processScope(DIScope Scope) {
1035 if (Scope.isType()) {
1040 if (Scope.isCompileUnit()) {
1041 addCompileUnit(DICompileUnit(Scope));
1044 if (Scope.isSubprogram()) {
1045 processSubprogram(DISubprogram(Scope));
1048 if (!addScope(Scope))
1050 if (Scope.isLexicalBlock()) {
1051 DILexicalBlock LB(Scope);
1052 processScope(LB.getContext());
1053 } else if (Scope.isLexicalBlockFile()) {
1054 DILexicalBlockFile LBF = DILexicalBlockFile(Scope);
1055 processScope(LBF.getScope());
1056 } else if (Scope.isNameSpace()) {
1057 DINameSpace NS(Scope);
1058 processScope(NS.getContext());
1062 /// processLexicalBlock
1063 void DebugInfoFinder::processLexicalBlock(DILexicalBlock LB) {
1064 DIScope Context = LB.getContext();
1065 if (Context.isLexicalBlock())
1066 return processLexicalBlock(DILexicalBlock(Context));
1067 else if (Context.isLexicalBlockFile()) {
1068 DILexicalBlockFile DBF = DILexicalBlockFile(Context);
1069 return processLexicalBlock(DILexicalBlock(DBF.getScope()));
1071 return processSubprogram(DISubprogram(Context));
1074 /// processSubprogram - Process DISubprogram.
1075 void DebugInfoFinder::processSubprogram(DISubprogram SP) {
1076 if (!addSubprogram(SP))
1078 processScope(SP.getContext().resolve(TypeIdentifierMap));
1079 processType(SP.getType());
1080 DIArray TParams = SP.getTemplateParams();
1081 for (unsigned I = 0, E = TParams.getNumElements(); I != E; ++I) {
1082 DIDescriptor Element = TParams.getElement(I);
1083 if (Element.isTemplateTypeParameter()) {
1084 DITemplateTypeParameter TType(Element);
1085 processScope(TType.getContext().resolve(TypeIdentifierMap));
1086 processType(TType.getType().resolve(TypeIdentifierMap));
1087 } else if (Element.isTemplateValueParameter()) {
1088 DITemplateValueParameter TVal(Element);
1089 processScope(TVal.getContext().resolve(TypeIdentifierMap));
1090 processType(TVal.getType().resolve(TypeIdentifierMap));
1095 /// processDeclare - Process DbgDeclareInst.
1096 void DebugInfoFinder::processDeclare(const Module &M,
1097 const DbgDeclareInst *DDI) {
1098 MDNode *N = dyn_cast<MDNode>(DDI->getVariable());
1101 InitializeTypeMap(M);
1104 if (!DV.isVariable())
1107 if (!NodesSeen.insert(DV))
1109 processScope(DIVariable(N).getContext());
1110 processType(DIVariable(N).getType());
1113 void DebugInfoFinder::processValue(const Module &M, const DbgValueInst *DVI) {
1114 MDNode *N = dyn_cast<MDNode>(DVI->getVariable());
1117 InitializeTypeMap(M);
1120 if (!DV.isVariable())
1123 if (!NodesSeen.insert(DV))
1125 processScope(DIVariable(N).getContext());
1126 processType(DIVariable(N).getType());
1129 /// addType - Add type into Tys.
1130 bool DebugInfoFinder::addType(DIType DT) {
1134 if (!NodesSeen.insert(DT))
1141 /// addCompileUnit - Add compile unit into CUs.
1142 bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
1145 if (!NodesSeen.insert(CU))
1152 /// addGlobalVariable - Add global variable into GVs.
1153 bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
1157 if (!NodesSeen.insert(DIG))
1164 // addSubprogram - Add subprgoram into SPs.
1165 bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
1169 if (!NodesSeen.insert(SP))
1176 bool DebugInfoFinder::addScope(DIScope Scope) {
1179 // FIXME: Ocaml binding generates a scope with no content, we treat it
1181 if (Scope->getNumOperands() == 0)
1183 if (!NodesSeen.insert(Scope))
1185 Scopes.push_back(Scope);
1189 //===----------------------------------------------------------------------===//
1190 // DIDescriptor: dump routines for all descriptors.
1191 //===----------------------------------------------------------------------===//
1193 /// dump - Print descriptor to dbgs() with a newline.
1194 void DIDescriptor::dump() const {
1199 /// print - Print descriptor.
1200 void DIDescriptor::print(raw_ostream &OS) const {
1204 if (const char *Tag = dwarf::TagString(getTag()))
1205 OS << "[ " << Tag << " ]";
1207 if (this->isSubrange()) {
1208 DISubrange(DbgNode).printInternal(OS);
1209 } else if (this->isCompileUnit()) {
1210 DICompileUnit(DbgNode).printInternal(OS);
1211 } else if (this->isFile()) {
1212 DIFile(DbgNode).printInternal(OS);
1213 } else if (this->isEnumerator()) {
1214 DIEnumerator(DbgNode).printInternal(OS);
1215 } else if (this->isBasicType()) {
1216 DIType(DbgNode).printInternal(OS);
1217 } else if (this->isDerivedType()) {
1218 DIDerivedType(DbgNode).printInternal(OS);
1219 } else if (this->isCompositeType()) {
1220 DICompositeType(DbgNode).printInternal(OS);
1221 } else if (this->isSubprogram()) {
1222 DISubprogram(DbgNode).printInternal(OS);
1223 } else if (this->isGlobalVariable()) {
1224 DIGlobalVariable(DbgNode).printInternal(OS);
1225 } else if (this->isVariable()) {
1226 DIVariable(DbgNode).printInternal(OS);
1227 } else if (this->isObjCProperty()) {
1228 DIObjCProperty(DbgNode).printInternal(OS);
1229 } else if (this->isNameSpace()) {
1230 DINameSpace(DbgNode).printInternal(OS);
1231 } else if (this->isScope()) {
1232 DIScope(DbgNode).printInternal(OS);
1236 void DISubrange::printInternal(raw_ostream &OS) const {
1237 int64_t Count = getCount();
1239 OS << " [" << getLo() << ", " << Count - 1 << ']';
1241 OS << " [unbounded]";
1244 void DIScope::printInternal(raw_ostream &OS) const {
1245 OS << " [" << getDirectory() << "/" << getFilename() << ']';
1248 void DICompileUnit::printInternal(raw_ostream &OS) const {
1249 DIScope::printInternal(OS);
1251 unsigned Lang = getLanguage();
1252 if (const char *LangStr = dwarf::LanguageString(Lang))
1255 (OS << "lang 0x").write_hex(Lang);
1259 void DIEnumerator::printInternal(raw_ostream &OS) const {
1260 OS << " [" << getName() << " :: " << getEnumValue() << ']';
1263 void DIType::printInternal(raw_ostream &OS) const {
1267 StringRef Res = getName();
1269 OS << " [" << Res << "]";
1271 // TODO: Print context?
1273 OS << " [line " << getLineNumber() << ", size " << getSizeInBits()
1274 << ", align " << getAlignInBits() << ", offset " << getOffsetInBits();
1276 if (const char *Enc =
1277 dwarf::AttributeEncodingString(DIBasicType(DbgNode).getEncoding()))
1278 OS << ", enc " << Enc;
1283 else if (isProtected())
1284 OS << " [protected]";
1287 OS << " [artificial]";
1289 if (isForwardDecl())
1291 else if (getTag() == dwarf::DW_TAG_structure_type ||
1292 getTag() == dwarf::DW_TAG_union_type ||
1293 getTag() == dwarf::DW_TAG_enumeration_type ||
1294 getTag() == dwarf::DW_TAG_class_type)
1298 if (isStaticMember())
1302 void DIDerivedType::printInternal(raw_ostream &OS) const {
1303 DIType::printInternal(OS);
1304 OS << " [from " << getTypeDerivedFrom().getName() << ']';
1307 void DICompositeType::printInternal(raw_ostream &OS) const {
1308 DIType::printInternal(OS);
1309 DIArray A = getTypeArray();
1310 OS << " [" << A.getNumElements() << " elements]";
1313 void DINameSpace::printInternal(raw_ostream &OS) const {
1314 StringRef Name = getName();
1316 OS << " [" << Name << ']';
1318 OS << " [line " << getLineNumber() << ']';
1321 void DISubprogram::printInternal(raw_ostream &OS) const {
1322 // TODO : Print context
1323 OS << " [line " << getLineNumber() << ']';
1325 if (isLocalToUnit())
1331 if (getScopeLineNumber() != getLineNumber())
1332 OS << " [scope " << getScopeLineNumber() << "]";
1336 else if (isProtected())
1337 OS << " [protected]";
1339 StringRef Res = getName();
1341 OS << " [" << Res << ']';
1344 void DIGlobalVariable::printInternal(raw_ostream &OS) const {
1345 StringRef Res = getName();
1347 OS << " [" << Res << ']';
1349 OS << " [line " << getLineNumber() << ']';
1351 // TODO : Print context
1353 if (isLocalToUnit())
1360 void DIVariable::printInternal(raw_ostream &OS) const {
1361 StringRef Res = getName();
1363 OS << " [" << Res << ']';
1365 OS << " [line " << getLineNumber() << ']';
1368 void DIObjCProperty::printInternal(raw_ostream &OS) const {
1369 StringRef Name = getObjCPropertyName();
1371 OS << " [" << Name << ']';
1373 OS << " [line " << getLineNumber() << ", properties " << getUnsignedField(6)
1377 static void printDebugLoc(DebugLoc DL, raw_ostream &CommentOS,
1378 const LLVMContext &Ctx) {
1379 if (!DL.isUnknown()) { // Print source line info.
1380 DIScope Scope(DL.getScope(Ctx));
1381 assert(Scope.isScope() && "Scope of a DebugLoc should be a DIScope.");
1382 // Omit the directory, because it's likely to be long and uninteresting.
1383 CommentOS << Scope.getFilename();
1384 CommentOS << ':' << DL.getLine();
1385 if (DL.getCol() != 0)
1386 CommentOS << ':' << DL.getCol();
1387 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(DL.getInlinedAt(Ctx));
1388 if (!InlinedAtDL.isUnknown()) {
1389 CommentOS << " @[ ";
1390 printDebugLoc(InlinedAtDL, CommentOS, Ctx);
1396 void DIVariable::printExtendedName(raw_ostream &OS) const {
1397 const LLVMContext &Ctx = DbgNode->getContext();
1398 StringRef Res = getName();
1400 OS << Res << "," << getLineNumber();
1401 if (MDNode *InlinedAt = getInlinedAt()) {
1402 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(InlinedAt);
1403 if (!InlinedAtDL.isUnknown()) {
1405 printDebugLoc(InlinedAtDL, OS, Ctx);
1411 /// Specialize constructor to make sure it has the correct type.
1412 template <> DIRef<DIScope>::DIRef(const Value *V) : Val(V) {
1413 assert(isScopeRef(V) && "DIScopeRef should be a MDString or MDNode");
1415 template <> DIRef<DIType>::DIRef(const Value *V) : Val(V) {
1416 assert(isTypeRef(V) && "DITypeRef should be a MDString or MDNode");
1419 /// Specialize getFieldAs to handle fields that are references to DIScopes.
1421 DIScopeRef DIDescriptor::getFieldAs<DIScopeRef>(unsigned Elt) const {
1422 return DIScopeRef(getField(DbgNode, Elt));
1424 /// Specialize getFieldAs to handle fields that are references to DITypes.
1425 template <> DITypeRef DIDescriptor::getFieldAs<DITypeRef>(unsigned Elt) const {
1426 return DITypeRef(getField(DbgNode, Elt));
1429 /// Strip debug info in the module if it exists.
1430 /// To do this, we remove all calls to the debugger intrinsics and any named
1431 /// metadata for debugging. We also remove debug locations for instructions.
1432 /// Return true if module is modified.
1433 bool llvm::StripDebugInfo(Module &M) {
1435 bool Changed = false;
1437 // Remove all of the calls to the debugger intrinsics, and remove them from
1439 if (Function *Declare = M.getFunction("llvm.dbg.declare")) {
1440 while (!Declare->use_empty()) {
1441 CallInst *CI = cast<CallInst>(Declare->use_back());
1442 CI->eraseFromParent();
1444 Declare->eraseFromParent();
1448 if (Function *DbgVal = M.getFunction("llvm.dbg.value")) {
1449 while (!DbgVal->use_empty()) {
1450 CallInst *CI = cast<CallInst>(DbgVal->use_back());
1451 CI->eraseFromParent();
1453 DbgVal->eraseFromParent();
1457 for (Module::named_metadata_iterator NMI = M.named_metadata_begin(),
1458 NME = M.named_metadata_end(); NMI != NME;) {
1459 NamedMDNode *NMD = NMI;
1461 if (NMD->getName().startswith("llvm.dbg.")) {
1462 NMD->eraseFromParent();
1467 for (Module::iterator MI = M.begin(), ME = M.end(); MI != ME; ++MI)
1468 for (Function::iterator FI = MI->begin(), FE = MI->end(); FI != FE;
1470 for (BasicBlock::iterator BI = FI->begin(), BE = FI->end(); BI != BE;
1472 if (!BI->getDebugLoc().isUnknown()) {
1474 BI->setDebugLoc(DebugLoc());
1481 /// Return Debug Info Metadata Version by checking module flags.
1482 unsigned llvm::getDebugMetadataVersionFromModule(const Module &M) {
1483 Value *Val = M.getModuleFlag("Debug Info Version");
1486 return cast<ConstantInt>(Val)->getZExtValue();