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 /// Verify - Verify that a compile unit is well formed.
372 bool DICompileUnit::Verify() const {
373 if (!isCompileUnit())
376 // Don't bother verifying the compilation directory or producer string
377 // as those could be empty.
378 if (getFilename().empty())
381 return DbgNode->getNumOperands() == 13;
384 /// Verify - Verify that an ObjC property is well formed.
385 bool DIObjCProperty::Verify() const {
386 if (!isObjCProperty())
389 // Don't worry about the rest of the strings for now.
390 return DbgNode->getNumOperands() == 8;
393 /// Check if a field at position Elt of a MDNode is a MDNode.
394 /// We currently allow an empty string and an integer.
395 /// But we don't allow a non-empty string in a MDNode field.
396 static bool fieldIsMDNode(const MDNode *DbgNode, unsigned Elt) {
397 // FIXME: This function should return true, if the field is null or the field
398 // is indeed a MDNode: return !Fld || isa<MDNode>(Fld).
399 Value *Fld = getField(DbgNode, Elt);
400 if (Fld && isa<MDString>(Fld) &&
401 !cast<MDString>(Fld)->getString().empty())
406 /// Check if a field at position Elt of a MDNode is a MDString.
407 static bool fieldIsMDString(const MDNode *DbgNode, unsigned Elt) {
408 Value *Fld = getField(DbgNode, Elt);
409 return !Fld || isa<MDString>(Fld);
412 /// Check if a value can be a reference to a type.
413 static bool isTypeRef(const Value *Val) {
415 (isa<MDString>(Val) && !cast<MDString>(Val)->getString().empty()) ||
416 (isa<MDNode>(Val) && DIType(cast<MDNode>(Val)).isType());
419 /// Check if a field at position Elt of a MDNode can be a reference to a type.
420 static bool fieldIsTypeRef(const MDNode *DbgNode, unsigned Elt) {
421 Value *Fld = getField(DbgNode, Elt);
422 return isTypeRef(Fld);
425 /// Check if a value can be a ScopeRef.
426 static bool isScopeRef(const Value *Val) {
428 (isa<MDString>(Val) && !cast<MDString>(Val)->getString().empty()) ||
429 (isa<MDNode>(Val) && DIScope(cast<MDNode>(Val)).isScope());
432 /// Check if a field at position Elt of a MDNode can be a ScopeRef.
433 static bool fieldIsScopeRef(const MDNode *DbgNode, unsigned Elt) {
434 Value *Fld = getField(DbgNode, Elt);
435 return isScopeRef(Fld);
438 /// Verify - Verify that a type descriptor is well formed.
439 bool DIType::Verify() const {
442 // Make sure Context @ field 2 is MDNode.
443 if (!fieldIsScopeRef(DbgNode, 2))
446 // FIXME: Sink this into the various subclass verifies.
447 uint16_t Tag = getTag();
448 if (!isBasicType() && Tag != dwarf::DW_TAG_const_type &&
449 Tag != dwarf::DW_TAG_volatile_type && Tag != dwarf::DW_TAG_pointer_type &&
450 Tag != dwarf::DW_TAG_ptr_to_member_type &&
451 Tag != dwarf::DW_TAG_reference_type &&
452 Tag != dwarf::DW_TAG_rvalue_reference_type &&
453 Tag != dwarf::DW_TAG_restrict_type && Tag != dwarf::DW_TAG_array_type &&
454 Tag != dwarf::DW_TAG_enumeration_type &&
455 Tag != dwarf::DW_TAG_subroutine_type &&
456 Tag != dwarf::DW_TAG_inheritance && Tag != dwarf::DW_TAG_friend &&
457 getFilename().empty())
459 // DIType is abstract, it should be a BasicType, a DerivedType or
462 DIBasicType(DbgNode).Verify();
463 else if (isCompositeType())
464 DICompositeType(DbgNode).Verify();
465 else if (isDerivedType())
466 DIDerivedType(DbgNode).Verify();
472 /// Verify - Verify that a basic type descriptor is well formed.
473 bool DIBasicType::Verify() const {
474 return isBasicType() && DbgNode->getNumOperands() == 10;
477 /// Verify - Verify that a derived type descriptor is well formed.
478 bool DIDerivedType::Verify() const {
479 // Make sure DerivedFrom @ field 9 is TypeRef.
480 if (!fieldIsTypeRef(DbgNode, 9))
482 if (getTag() == dwarf::DW_TAG_ptr_to_member_type)
483 // Make sure ClassType @ field 10 is a TypeRef.
484 if (!fieldIsTypeRef(DbgNode, 10))
487 return isDerivedType() && DbgNode->getNumOperands() >= 10 &&
488 DbgNode->getNumOperands() <= 14;
491 /// Verify - Verify that a composite type descriptor is well formed.
492 bool DICompositeType::Verify() const {
493 if (!isCompositeType())
496 // Make sure DerivedFrom @ field 9 and ContainingType @ field 12 are TypeRef.
497 if (!fieldIsTypeRef(DbgNode, 9))
499 if (!fieldIsTypeRef(DbgNode, 12))
502 // Make sure the type identifier at field 14 is MDString, it can be null.
503 if (!fieldIsMDString(DbgNode, 14))
506 return DbgNode->getNumOperands() == 15;
509 /// Verify - Verify that a subprogram descriptor is well formed.
510 bool DISubprogram::Verify() const {
514 // Make sure context @ field 2 is a ScopeRef and type @ field 7 is a MDNode.
515 if (!fieldIsScopeRef(DbgNode, 2))
517 if (!fieldIsMDNode(DbgNode, 7))
519 // Containing type @ field 12.
520 if (!fieldIsTypeRef(DbgNode, 12))
522 return DbgNode->getNumOperands() == 20;
525 /// Verify - Verify that a global variable descriptor is well formed.
526 bool DIGlobalVariable::Verify() const {
527 if (!isGlobalVariable())
530 if (getDisplayName().empty())
532 // Make sure context @ field 2 and type @ field 8 are MDNodes.
533 if (!fieldIsMDNode(DbgNode, 2))
535 if (!fieldIsMDNode(DbgNode, 8))
537 // Make sure StaticDataMemberDeclaration @ field 12 is MDNode.
538 if (!fieldIsMDNode(DbgNode, 12))
541 return DbgNode->getNumOperands() == 13;
544 /// Verify - Verify that a variable descriptor is well formed.
545 bool DIVariable::Verify() const {
549 // Make sure context @ field 1 and type @ field 5 are MDNodes.
550 if (!fieldIsMDNode(DbgNode, 1))
552 if (!fieldIsMDNode(DbgNode, 5))
554 return DbgNode->getNumOperands() >= 8;
557 /// Verify - Verify that a location descriptor is well formed.
558 bool DILocation::Verify() const {
562 return DbgNode->getNumOperands() == 4;
565 /// Verify - Verify that a namespace descriptor is well formed.
566 bool DINameSpace::Verify() const {
569 return DbgNode->getNumOperands() == 5;
572 /// \brief Retrieve the MDNode for the directory/file pair.
573 MDNode *DIFile::getFileNode() const {
574 return getNodeField(DbgNode, 1);
577 /// \brief Verify that the file descriptor is well formed.
578 bool DIFile::Verify() const {
579 return isFile() && DbgNode->getNumOperands() == 2;
582 /// \brief Verify that the enumerator descriptor is well formed.
583 bool DIEnumerator::Verify() const {
584 return isEnumerator() && DbgNode->getNumOperands() == 3;
587 /// \brief Verify that the subrange descriptor is well formed.
588 bool DISubrange::Verify() const {
589 return isSubrange() && DbgNode->getNumOperands() == 3;
592 /// \brief Verify that the lexical block descriptor is well formed.
593 bool DILexicalBlock::Verify() const {
594 return isLexicalBlock() && DbgNode->getNumOperands() == 6;
597 /// \brief Verify that the file-scoped lexical block descriptor is well formed.
598 bool DILexicalBlockFile::Verify() const {
599 return isLexicalBlockFile() && DbgNode->getNumOperands() == 3;
602 /// \brief Verify that the template type parameter descriptor is well formed.
603 bool DITemplateTypeParameter::Verify() const {
604 return isTemplateTypeParameter() && DbgNode->getNumOperands() == 7;
607 /// \brief Verify that the template value parameter descriptor is well formed.
608 bool DITemplateValueParameter::Verify() const {
609 return isTemplateValueParameter() && DbgNode->getNumOperands() == 8;
612 /// \brief Verify that the imported module descriptor is well formed.
613 bool DIImportedEntity::Verify() const {
614 return isImportedEntity() &&
615 (DbgNode->getNumOperands() == 4 || DbgNode->getNumOperands() == 5);
618 /// getObjCProperty - Return property node, if this ivar is associated with one.
619 MDNode *DIDerivedType::getObjCProperty() const {
620 return getNodeField(DbgNode, 10);
623 MDString *DICompositeType::getIdentifier() const {
624 return cast_or_null<MDString>(getField(DbgNode, 14));
628 static void VerifySubsetOf(const MDNode *LHS, const MDNode *RHS) {
629 for (unsigned i = 0; i != LHS->getNumOperands(); ++i) {
630 // Skip the 'empty' list (that's a single i32 0, rather than truly empty).
631 if (i == 0 && isa<ConstantInt>(LHS->getOperand(i)))
633 const MDNode *E = cast<MDNode>(LHS->getOperand(i));
635 for (unsigned j = 0; !found && j != RHS->getNumOperands(); ++j)
636 found = E == RHS->getOperand(j);
637 assert(found && "Losing a member during member list replacement");
642 /// \brief Set the array of member DITypes.
643 void DICompositeType::setTypeArray(DIArray Elements, DIArray TParams) {
644 assert((!TParams || DbgNode->getNumOperands() == 15) &&
645 "If you're setting the template parameters this should include a slot "
647 TrackingVH<MDNode> N(*this);
650 // Check that the new list of members contains all the old members as well.
651 if (const MDNode *El = cast_or_null<MDNode>(N->getOperand(10)))
652 VerifySubsetOf(El, Elements);
654 N->replaceOperandWith(10, Elements);
657 N->replaceOperandWith(13, TParams);
661 void DICompositeType::addMember(DIDescriptor D) {
662 SmallVector<llvm::Value *, 16> M;
663 DIArray OrigM = getTypeArray();
664 unsigned Elements = OrigM.getNumElements();
665 if (Elements == 1 && !OrigM.getElement(0))
667 M.reserve(Elements + 1);
668 for (unsigned i = 0; i != Elements; ++i)
669 M.push_back(OrigM.getElement(i));
671 setTypeArray(DIArray(MDNode::get(DbgNode->getContext(), M)));
674 /// Generate a reference to this DIType. Uses the type identifier instead
675 /// of the actual MDNode if possible, to help type uniquing.
676 DIScopeRef DIScope::getRef() const {
677 if (!isCompositeType())
678 return DIScopeRef(*this);
679 DICompositeType DTy(DbgNode);
680 if (!DTy.getIdentifier())
681 return DIScopeRef(*this);
682 return DIScopeRef(DTy.getIdentifier());
685 /// \brief Set the containing type.
686 void DICompositeType::setContainingType(DICompositeType ContainingType) {
687 TrackingVH<MDNode> N(*this);
688 N->replaceOperandWith(12, ContainingType.getRef());
692 /// isInlinedFnArgument - Return true if this variable provides debugging
693 /// information for an inlined function arguments.
694 bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
695 assert(CurFn && "Invalid function");
696 if (!getContext().isSubprogram())
698 // This variable is not inlined function argument if its scope
699 // does not describe current function.
700 return !DISubprogram(getContext()).describes(CurFn);
703 /// describes - Return true if this subprogram provides debugging
704 /// information for the function F.
705 bool DISubprogram::describes(const Function *F) {
706 assert(F && "Invalid function");
707 if (F == getFunction())
709 StringRef Name = getLinkageName();
712 if (F->getName() == Name)
717 unsigned DISubprogram::isOptimized() const {
718 assert (DbgNode && "Invalid subprogram descriptor!");
719 if (DbgNode->getNumOperands() == 15)
720 return getUnsignedField(14);
724 MDNode *DISubprogram::getVariablesNodes() const {
725 return getNodeField(DbgNode, 18);
728 DIArray DISubprogram::getVariables() const {
729 return DIArray(getNodeField(DbgNode, 18));
732 Value *DITemplateValueParameter::getValue() const {
733 return getField(DbgNode, 4);
736 // If the current node has a parent scope then return that,
737 // else return an empty scope.
738 DIScopeRef DIScope::getContext() const {
741 return DIType(DbgNode).getContext();
744 return DIScopeRef(DISubprogram(DbgNode).getContext());
746 if (isLexicalBlock())
747 return DIScopeRef(DILexicalBlock(DbgNode).getContext());
749 if (isLexicalBlockFile())
750 return DIScopeRef(DILexicalBlockFile(DbgNode).getContext());
753 return DIScopeRef(DINameSpace(DbgNode).getContext());
755 assert((isFile() || isCompileUnit()) && "Unhandled type of scope.");
756 return DIScopeRef(NULL);
759 // If the scope node has a name, return that, else return an empty string.
760 StringRef DIScope::getName() const {
762 return DIType(DbgNode).getName();
764 return DISubprogram(DbgNode).getName();
766 return DINameSpace(DbgNode).getName();
767 assert((isLexicalBlock() || isLexicalBlockFile() || isFile() ||
768 isCompileUnit()) && "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));
806 DIArray DICompileUnit::getGlobalVariables() const {
807 if (!DbgNode || DbgNode->getNumOperands() < 13)
810 return DIArray(getNodeField(DbgNode, 10));
813 DIArray DICompileUnit::getImportedEntities() const {
814 if (!DbgNode || DbgNode->getNumOperands() < 13)
817 return DIArray(getNodeField(DbgNode, 11));
820 /// fixupSubprogramName - Replace contains special characters used
821 /// in a typical Objective-C names with '.' in a given string.
822 static void fixupSubprogramName(DISubprogram Fn, SmallVectorImpl<char> &Out) {
824 Fn.getFunction() ? Fn.getFunction()->getName() : Fn.getName();
825 FName = Function::getRealLinkageName(FName);
827 StringRef Prefix("llvm.dbg.lv.");
828 Out.reserve(FName.size() + Prefix.size());
829 Out.append(Prefix.begin(), Prefix.end());
831 bool isObjCLike = false;
832 for (size_t i = 0, e = FName.size(); i < e; ++i) {
837 if (isObjCLike && (C == '[' || C == ']' || C == ' ' || C == ':' ||
838 C == '+' || C == '(' || C == ')'))
845 /// getFnSpecificMDNode - Return a NameMDNode, if available, that is
846 /// suitable to hold function specific information.
847 NamedMDNode *llvm::getFnSpecificMDNode(const Module &M, DISubprogram Fn) {
848 SmallString<32> Name;
849 fixupSubprogramName(Fn, Name);
850 return M.getNamedMetadata(Name.str());
853 /// getOrInsertFnSpecificMDNode - Return a NameMDNode that is suitable
854 /// to hold function specific information.
855 NamedMDNode *llvm::getOrInsertFnSpecificMDNode(Module &M, DISubprogram Fn) {
856 SmallString<32> Name;
857 fixupSubprogramName(Fn, Name);
858 return M.getOrInsertNamedMetadata(Name.str());
861 /// createInlinedVariable - Create a new inlined variable based on current
863 /// @param DV Current Variable.
864 /// @param InlinedScope Location at current variable is inlined.
865 DIVariable llvm::createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
866 LLVMContext &VMContext) {
867 SmallVector<Value *, 16> Elts;
868 // Insert inlined scope as 7th element.
869 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
870 i == 7 ? Elts.push_back(InlinedScope) :
871 Elts.push_back(DV->getOperand(i));
872 return DIVariable(MDNode::get(VMContext, Elts));
875 /// cleanseInlinedVariable - Remove inlined scope from the variable.
876 DIVariable llvm::cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext) {
877 SmallVector<Value *, 16> Elts;
878 // Insert inlined scope as 7th element.
879 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
881 Elts.push_back(Constant::getNullValue(Type::getInt32Ty(VMContext))):
882 Elts.push_back(DV->getOperand(i));
883 return DIVariable(MDNode::get(VMContext, Elts));
886 /// getDISubprogram - Find subprogram that is enclosing this scope.
887 DISubprogram llvm::getDISubprogram(const MDNode *Scope) {
888 DIDescriptor D(Scope);
889 if (D.isSubprogram())
890 return DISubprogram(Scope);
892 if (D.isLexicalBlockFile())
893 return getDISubprogram(DILexicalBlockFile(Scope).getContext());
895 if (D.isLexicalBlock())
896 return getDISubprogram(DILexicalBlock(Scope).getContext());
898 return DISubprogram();
901 /// getDICompositeType - Find underlying composite type.
902 DICompositeType llvm::getDICompositeType(DIType T) {
903 if (T.isCompositeType())
904 return DICompositeType(T);
906 if (T.isDerivedType()) {
907 // This function is currently used by dragonegg and dragonegg does
908 // not generate identifier for types, so using an empty map to resolve
909 // DerivedFrom should be fine.
910 DITypeIdentifierMap EmptyMap;
911 return getDICompositeType(DIDerivedType(T).getTypeDerivedFrom()
915 return DICompositeType();
918 /// Update DITypeIdentifierMap by going through retained types of each CU.
919 DITypeIdentifierMap llvm::generateDITypeIdentifierMap(
920 const NamedMDNode *CU_Nodes) {
921 DITypeIdentifierMap Map;
922 for (unsigned CUi = 0, CUe = CU_Nodes->getNumOperands(); CUi != CUe; ++CUi) {
923 DICompileUnit CU(CU_Nodes->getOperand(CUi));
924 DIArray Retain = CU.getRetainedTypes();
925 for (unsigned Ti = 0, Te = Retain.getNumElements(); Ti != Te; ++Ti) {
926 if (!Retain.getElement(Ti).isCompositeType())
928 DICompositeType Ty(Retain.getElement(Ti));
929 if (MDString *TypeId = Ty.getIdentifier()) {
930 // Definition has priority over declaration.
931 // Try to insert (TypeId, Ty) to Map.
932 std::pair<DITypeIdentifierMap::iterator, bool> P =
933 Map.insert(std::make_pair(TypeId, Ty));
934 // If TypeId already exists in Map and this is a definition, replace
935 // whatever we had (declaration or definition) with the definition.
936 if (!P.second && !Ty.isForwardDecl())
937 P.first->second = Ty;
944 //===----------------------------------------------------------------------===//
945 // DebugInfoFinder implementations.
946 //===----------------------------------------------------------------------===//
948 void DebugInfoFinder::reset() {
955 TypeIdentifierMap.clear();
958 /// processModule - Process entire module and collect debug info.
959 void DebugInfoFinder::processModule(const Module &M) {
960 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
961 TypeIdentifierMap = generateDITypeIdentifierMap(CU_Nodes);
962 for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
963 DICompileUnit CU(CU_Nodes->getOperand(i));
965 DIArray GVs = CU.getGlobalVariables();
966 for (unsigned i = 0, e = GVs.getNumElements(); i != e; ++i) {
967 DIGlobalVariable DIG(GVs.getElement(i));
968 if (addGlobalVariable(DIG)) {
969 processScope(DIG.getContext());
970 processType(DIG.getType());
973 DIArray SPs = CU.getSubprograms();
974 for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i)
975 processSubprogram(DISubprogram(SPs.getElement(i)));
976 DIArray EnumTypes = CU.getEnumTypes();
977 for (unsigned i = 0, e = EnumTypes.getNumElements(); i != e; ++i)
978 processType(DIType(EnumTypes.getElement(i)));
979 DIArray RetainedTypes = CU.getRetainedTypes();
980 for (unsigned i = 0, e = RetainedTypes.getNumElements(); i != e; ++i)
981 processType(DIType(RetainedTypes.getElement(i)));
982 DIArray Imports = CU.getImportedEntities();
983 for (unsigned i = 0, e = Imports.getNumElements(); i != e; ++i) {
984 DIImportedEntity Import = DIImportedEntity(
985 Imports.getElement(i));
986 DIDescriptor Entity = Import.getEntity();
988 processType(DIType(Entity));
989 else if (Entity.isSubprogram())
990 processSubprogram(DISubprogram(Entity));
991 else if (Entity.isNameSpace())
992 processScope(DINameSpace(Entity).getContext());
994 // FIXME: We really shouldn't be bailing out after visiting just one CU
1000 /// processLocation - Process DILocation.
1001 void DebugInfoFinder::processLocation(DILocation Loc) {
1003 processScope(Loc.getScope());
1004 processLocation(Loc.getOrigLocation());
1007 /// processType - Process DIType.
1008 void DebugInfoFinder::processType(DIType DT) {
1011 processScope(DT.getContext().resolve(TypeIdentifierMap));
1012 if (DT.isCompositeType()) {
1013 DICompositeType DCT(DT);
1014 processType(DCT.getTypeDerivedFrom().resolve(TypeIdentifierMap));
1015 DIArray DA = DCT.getTypeArray();
1016 for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
1017 DIDescriptor D = DA.getElement(i);
1019 processType(DIType(D));
1020 else if (D.isSubprogram())
1021 processSubprogram(DISubprogram(D));
1023 } else if (DT.isDerivedType()) {
1024 DIDerivedType DDT(DT);
1025 processType(DDT.getTypeDerivedFrom().resolve(TypeIdentifierMap));
1029 void DebugInfoFinder::processScope(DIScope Scope) {
1030 if (Scope.isType()) {
1035 if (Scope.isCompileUnit()) {
1036 addCompileUnit(DICompileUnit(Scope));
1039 if (Scope.isSubprogram()) {
1040 processSubprogram(DISubprogram(Scope));
1043 if (!addScope(Scope))
1045 if (Scope.isLexicalBlock()) {
1046 DILexicalBlock LB(Scope);
1047 processScope(LB.getContext());
1048 } else if (Scope.isLexicalBlockFile()) {
1049 DILexicalBlockFile LBF = DILexicalBlockFile(Scope);
1050 processScope(LBF.getScope());
1051 } else if (Scope.isNameSpace()) {
1052 DINameSpace NS(Scope);
1053 processScope(NS.getContext());
1057 /// processLexicalBlock
1058 void DebugInfoFinder::processLexicalBlock(DILexicalBlock LB) {
1059 DIScope Context = LB.getContext();
1060 if (Context.isLexicalBlock())
1061 return processLexicalBlock(DILexicalBlock(Context));
1062 else if (Context.isLexicalBlockFile()) {
1063 DILexicalBlockFile DBF = DILexicalBlockFile(Context);
1064 return processLexicalBlock(DILexicalBlock(DBF.getScope()));
1067 return processSubprogram(DISubprogram(Context));
1070 /// processSubprogram - Process DISubprogram.
1071 void DebugInfoFinder::processSubprogram(DISubprogram SP) {
1072 if (!addSubprogram(SP))
1074 processScope(SP.getContext().resolve(TypeIdentifierMap));
1075 processType(SP.getType());
1076 DIArray TParams = SP.getTemplateParams();
1077 for (unsigned I = 0, E = TParams.getNumElements(); I != E; ++I) {
1078 DIDescriptor Element = TParams.getElement(I);
1079 if (Element.isTemplateTypeParameter()) {
1080 DITemplateTypeParameter TType(Element);
1081 processScope(TType.getContext().resolve(TypeIdentifierMap));
1082 processType(TType.getType().resolve(TypeIdentifierMap));
1083 } else if (Element.isTemplateValueParameter()) {
1084 DITemplateValueParameter TVal(Element);
1085 processScope(TVal.getContext().resolve(TypeIdentifierMap));
1086 processType(TVal.getType().resolve(TypeIdentifierMap));
1091 /// processDeclare - Process DbgDeclareInst.
1092 void DebugInfoFinder::processDeclare(const DbgDeclareInst *DDI) {
1093 MDNode *N = dyn_cast<MDNode>(DDI->getVariable());
1097 if (!DV.isVariable())
1100 if (!NodesSeen.insert(DV))
1102 processScope(DIVariable(N).getContext());
1103 processType(DIVariable(N).getType());
1106 void DebugInfoFinder::processValue(const DbgValueInst *DVI) {
1107 MDNode *N = dyn_cast<MDNode>(DVI->getVariable());
1111 if (!DV.isVariable())
1114 if (!NodesSeen.insert(DV))
1116 processScope(DIVariable(N).getContext());
1117 processType(DIVariable(N).getType());
1120 /// addType - Add type into Tys.
1121 bool DebugInfoFinder::addType(DIType DT) {
1125 if (!NodesSeen.insert(DT))
1132 /// addCompileUnit - Add compile unit into CUs.
1133 bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
1136 if (!NodesSeen.insert(CU))
1143 /// addGlobalVariable - Add global variable into GVs.
1144 bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
1148 if (!NodesSeen.insert(DIG))
1155 // addSubprogram - Add subprgoram into SPs.
1156 bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
1160 if (!NodesSeen.insert(SP))
1167 bool DebugInfoFinder::addScope(DIScope Scope) {
1170 // FIXME: Ocaml binding generates a scope with no content, we treat it
1172 if (Scope->getNumOperands() == 0)
1174 if (!NodesSeen.insert(Scope))
1176 Scopes.push_back(Scope);
1180 //===----------------------------------------------------------------------===//
1181 // DIDescriptor: dump routines for all descriptors.
1182 //===----------------------------------------------------------------------===//
1184 /// dump - Print descriptor to dbgs() with a newline.
1185 void DIDescriptor::dump() const {
1186 print(dbgs()); dbgs() << '\n';
1189 /// print - Print descriptor.
1190 void DIDescriptor::print(raw_ostream &OS) const {
1191 if (!DbgNode) return;
1193 if (const char *Tag = dwarf::TagString(getTag()))
1194 OS << "[ " << Tag << " ]";
1196 if (this->isSubrange()) {
1197 DISubrange(DbgNode).printInternal(OS);
1198 } else if (this->isCompileUnit()) {
1199 DICompileUnit(DbgNode).printInternal(OS);
1200 } else if (this->isFile()) {
1201 DIFile(DbgNode).printInternal(OS);
1202 } else if (this->isEnumerator()) {
1203 DIEnumerator(DbgNode).printInternal(OS);
1204 } else if (this->isBasicType()) {
1205 DIType(DbgNode).printInternal(OS);
1206 } else if (this->isDerivedType()) {
1207 DIDerivedType(DbgNode).printInternal(OS);
1208 } else if (this->isCompositeType()) {
1209 DICompositeType(DbgNode).printInternal(OS);
1210 } else if (this->isSubprogram()) {
1211 DISubprogram(DbgNode).printInternal(OS);
1212 } else if (this->isGlobalVariable()) {
1213 DIGlobalVariable(DbgNode).printInternal(OS);
1214 } else if (this->isVariable()) {
1215 DIVariable(DbgNode).printInternal(OS);
1216 } else if (this->isObjCProperty()) {
1217 DIObjCProperty(DbgNode).printInternal(OS);
1218 } else if (this->isNameSpace()) {
1219 DINameSpace(DbgNode).printInternal(OS);
1220 } else if (this->isScope()) {
1221 DIScope(DbgNode).printInternal(OS);
1225 void DISubrange::printInternal(raw_ostream &OS) const {
1226 int64_t Count = getCount();
1228 OS << " [" << getLo() << ", " << Count - 1 << ']';
1230 OS << " [unbounded]";
1233 void DIScope::printInternal(raw_ostream &OS) const {
1234 OS << " [" << getDirectory() << "/" << getFilename() << ']';
1237 void DICompileUnit::printInternal(raw_ostream &OS) const {
1238 DIScope::printInternal(OS);
1240 unsigned Lang = getLanguage();
1241 if (const char *LangStr = dwarf::LanguageString(Lang))
1244 (OS << "lang 0x").write_hex(Lang);
1248 void DIEnumerator::printInternal(raw_ostream &OS) const {
1249 OS << " [" << getName() << " :: " << getEnumValue() << ']';
1252 void DIType::printInternal(raw_ostream &OS) const {
1253 if (!DbgNode) return;
1255 StringRef Res = getName();
1257 OS << " [" << Res << "]";
1259 // TODO: Print context?
1261 OS << " [line " << getLineNumber()
1262 << ", size " << getSizeInBits()
1263 << ", align " << getAlignInBits()
1264 << ", offset " << getOffsetInBits();
1266 if (const char *Enc =
1267 dwarf::AttributeEncodingString(DIBasicType(DbgNode).getEncoding()))
1268 OS << ", enc " << Enc;
1273 else if (isProtected())
1274 OS << " [protected]";
1277 OS << " [artificial]";
1279 if (isForwardDecl())
1281 else if (getTag() == dwarf::DW_TAG_structure_type ||
1282 getTag() == dwarf::DW_TAG_union_type ||
1283 getTag() == dwarf::DW_TAG_enumeration_type ||
1284 getTag() == dwarf::DW_TAG_class_type)
1288 if (isStaticMember())
1292 void DIDerivedType::printInternal(raw_ostream &OS) const {
1293 DIType::printInternal(OS);
1294 OS << " [from " << getTypeDerivedFrom().getName() << ']';
1297 void DICompositeType::printInternal(raw_ostream &OS) const {
1298 DIType::printInternal(OS);
1299 DIArray A = getTypeArray();
1300 OS << " [" << A.getNumElements() << " elements]";
1303 void DINameSpace::printInternal(raw_ostream &OS) const {
1304 StringRef Name = getName();
1306 OS << " [" << Name << ']';
1308 OS << " [line " << getLineNumber() << ']';
1311 void DISubprogram::printInternal(raw_ostream &OS) const {
1312 // TODO : Print context
1313 OS << " [line " << getLineNumber() << ']';
1315 if (isLocalToUnit())
1321 if (getScopeLineNumber() != getLineNumber())
1322 OS << " [scope " << getScopeLineNumber() << "]";
1326 else if (isProtected())
1327 OS << " [protected]";
1329 StringRef Res = getName();
1331 OS << " [" << Res << ']';
1334 void DIGlobalVariable::printInternal(raw_ostream &OS) const {
1335 StringRef Res = getName();
1337 OS << " [" << Res << ']';
1339 OS << " [line " << getLineNumber() << ']';
1341 // TODO : Print context
1343 if (isLocalToUnit())
1350 void DIVariable::printInternal(raw_ostream &OS) const {
1351 StringRef Res = getName();
1353 OS << " [" << Res << ']';
1355 OS << " [line " << getLineNumber() << ']';
1358 void DIObjCProperty::printInternal(raw_ostream &OS) const {
1359 StringRef Name = getObjCPropertyName();
1361 OS << " [" << Name << ']';
1363 OS << " [line " << getLineNumber()
1364 << ", properties " << getUnsignedField(6) << ']';
1367 static void printDebugLoc(DebugLoc DL, raw_ostream &CommentOS,
1368 const LLVMContext &Ctx) {
1369 if (!DL.isUnknown()) { // Print source line info.
1370 DIScope Scope(DL.getScope(Ctx));
1371 assert(Scope.isScope() &&
1372 "Scope of a DebugLoc should be a DIScope.");
1373 // Omit the directory, because it's likely to be long and uninteresting.
1374 CommentOS << Scope.getFilename();
1375 CommentOS << ':' << DL.getLine();
1376 if (DL.getCol() != 0)
1377 CommentOS << ':' << DL.getCol();
1378 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(DL.getInlinedAt(Ctx));
1379 if (!InlinedAtDL.isUnknown()) {
1380 CommentOS << " @[ ";
1381 printDebugLoc(InlinedAtDL, CommentOS, Ctx);
1387 void DIVariable::printExtendedName(raw_ostream &OS) const {
1388 const LLVMContext &Ctx = DbgNode->getContext();
1389 StringRef Res = getName();
1391 OS << Res << "," << getLineNumber();
1392 if (MDNode *InlinedAt = getInlinedAt()) {
1393 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(InlinedAt);
1394 if (!InlinedAtDL.isUnknown()) {
1396 printDebugLoc(InlinedAtDL, OS, Ctx);
1402 /// Specialize constructor to make sure it has the correct type.
1404 DIRef<DIScope>::DIRef(const Value *V) : Val(V) {
1405 assert(isScopeRef(V) && "DIScopeRef should be a MDString or MDNode");
1408 DIRef<DIType>::DIRef(const Value *V) : Val(V) {
1409 assert(isTypeRef(V) && "DITypeRef should be a MDString or MDNode");
1412 /// Specialize getFieldAs to handle fields that are references to DIScopes.
1414 DIScopeRef DIDescriptor::getFieldAs<DIScopeRef>(unsigned Elt) const {
1415 return DIScopeRef(getField(DbgNode, Elt));
1417 /// Specialize getFieldAs to handle fields that are references to DITypes.
1419 DITypeRef DIDescriptor::getFieldAs<DITypeRef>(unsigned Elt) const {
1420 return DITypeRef(getField(DbgNode, Elt));