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:
256 /// isTemplateTypeParameter - Return true if the specified tag is
257 /// DW_TAG_template_type_parameter.
258 bool DIDescriptor::isTemplateTypeParameter() const {
259 return DbgNode && getTag() == dwarf::DW_TAG_template_type_parameter;
262 /// isTemplateValueParameter - Return true if the specified tag is
263 /// DW_TAG_template_value_parameter.
264 bool DIDescriptor::isTemplateValueParameter() const {
265 return DbgNode && (getTag() == dwarf::DW_TAG_template_value_parameter ||
266 getTag() == dwarf::DW_TAG_GNU_template_template_param ||
267 getTag() == dwarf::DW_TAG_GNU_template_parameter_pack);
270 /// isCompileUnit - Return true if the specified tag is DW_TAG_compile_unit.
271 bool DIDescriptor::isCompileUnit() const {
272 return DbgNode && getTag() == dwarf::DW_TAG_compile_unit;
275 /// isFile - Return true if the specified tag is DW_TAG_file_type.
276 bool DIDescriptor::isFile() const {
277 return DbgNode && getTag() == dwarf::DW_TAG_file_type;
280 /// isNameSpace - Return true if the specified tag is DW_TAG_namespace.
281 bool DIDescriptor::isNameSpace() const {
282 return DbgNode && getTag() == dwarf::DW_TAG_namespace;
285 /// isLexicalBlockFile - Return true if the specified descriptor is a
286 /// lexical block with an extra file.
287 bool DIDescriptor::isLexicalBlockFile() const {
288 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
289 (DbgNode->getNumOperands() == 3);
292 /// isLexicalBlock - Return true if the specified tag is DW_TAG_lexical_block.
293 bool DIDescriptor::isLexicalBlock() const {
294 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
295 (DbgNode->getNumOperands() > 3);
298 /// isSubrange - Return true if the specified tag is DW_TAG_subrange_type.
299 bool DIDescriptor::isSubrange() const {
300 return DbgNode && getTag() == dwarf::DW_TAG_subrange_type;
303 /// isEnumerator - Return true if the specified tag is DW_TAG_enumerator.
304 bool DIDescriptor::isEnumerator() const {
305 return DbgNode && getTag() == dwarf::DW_TAG_enumerator;
308 /// isObjCProperty - Return true if the specified tag is DW_TAG_APPLE_property.
309 bool DIDescriptor::isObjCProperty() const {
310 return DbgNode && getTag() == dwarf::DW_TAG_APPLE_property;
313 /// \brief Return true if the specified tag is DW_TAG_imported_module or
314 /// DW_TAG_imported_declaration.
315 bool DIDescriptor::isImportedEntity() const {
316 return DbgNode && (getTag() == dwarf::DW_TAG_imported_module ||
317 getTag() == dwarf::DW_TAG_imported_declaration);
320 //===----------------------------------------------------------------------===//
321 // Simple Descriptor Constructors and other Methods
322 //===----------------------------------------------------------------------===//
324 unsigned DIArray::getNumElements() const {
327 return DbgNode->getNumOperands();
330 /// replaceAllUsesWith - Replace all uses of the MDNode used by this
331 /// type with the one in the passed descriptor.
332 void DIType::replaceAllUsesWith(DIDescriptor &D) {
334 assert(DbgNode && "Trying to replace an unverified type!");
336 // Since we use a TrackingVH for the node, its easy for clients to manufacture
337 // legitimate situations where they want to replaceAllUsesWith() on something
338 // which, due to uniquing, has merged with the source. We shield clients from
339 // this detail by allowing a value to be replaced with replaceAllUsesWith()
342 MDNode *Node = const_cast<MDNode*>(DbgNode);
343 const MDNode *DN = D;
344 const Value *V = cast_or_null<Value>(DN);
345 Node->replaceAllUsesWith(const_cast<Value*>(V));
346 MDNode::deleteTemporary(Node);
350 /// replaceAllUsesWith - Replace all uses of the MDNode used by this
351 /// type with the one in D.
352 void DIType::replaceAllUsesWith(MDNode *D) {
354 assert(DbgNode && "Trying to replace an unverified type!");
356 // Since we use a TrackingVH for the node, its easy for clients to manufacture
357 // legitimate situations where they want to replaceAllUsesWith() on something
358 // which, due to uniquing, has merged with the source. We shield clients from
359 // this detail by allowing a value to be replaced with replaceAllUsesWith()
362 MDNode *Node = const_cast<MDNode*>(DbgNode);
363 const MDNode *DN = D;
364 const Value *V = cast_or_null<Value>(DN);
365 Node->replaceAllUsesWith(const_cast<Value*>(V));
366 MDNode::deleteTemporary(Node);
370 /// isUnsignedDIType - Return true if type encoding is unsigned.
371 bool DIType::isUnsignedDIType() {
372 DIDerivedType DTy(DbgNode);
374 return DTy.getTypeDerivedFrom().isUnsignedDIType();
376 DIBasicType BTy(DbgNode);
378 unsigned Encoding = BTy.getEncoding();
379 if (Encoding == dwarf::DW_ATE_unsigned ||
380 Encoding == dwarf::DW_ATE_unsigned_char ||
381 Encoding == dwarf::DW_ATE_boolean)
387 /// Verify - Verify that a compile unit is well formed.
388 bool DICompileUnit::Verify() const {
389 if (!isCompileUnit())
392 // Don't bother verifying the compilation directory or producer string
393 // as those could be empty.
394 if (getFilename().empty())
397 return DbgNode->getNumOperands() == 13;
400 /// Verify - Verify that an ObjC property is well formed.
401 bool DIObjCProperty::Verify() const {
402 if (!isObjCProperty())
405 // Don't worry about the rest of the strings for now.
406 return DbgNode->getNumOperands() == 8;
409 /// We allow an empty string to represent null. But we don't allow
410 /// a non-empty string in a MDNode field.
411 static bool fieldIsMDNode(const MDNode *DbgNode, unsigned Elt) {
412 Value *Fld = getField(DbgNode, Elt);
413 if (Fld && isa<MDString>(Fld) &&
414 !cast<MDString>(Fld)->getString().empty())
419 /// Verify - Verify that a type descriptor is well formed.
420 bool DIType::Verify() const {
423 // Make sure Context @ field 2 is MDNode.
424 if (!fieldIsMDNode(DbgNode, 2))
427 // FIXME: Sink this into the various subclass verifies.
428 unsigned Tag = getTag();
429 if (!isBasicType() && Tag != dwarf::DW_TAG_const_type &&
430 Tag != dwarf::DW_TAG_volatile_type && Tag != dwarf::DW_TAG_pointer_type &&
431 Tag != dwarf::DW_TAG_ptr_to_member_type &&
432 Tag != dwarf::DW_TAG_reference_type &&
433 Tag != dwarf::DW_TAG_rvalue_reference_type &&
434 Tag != dwarf::DW_TAG_restrict_type && Tag != dwarf::DW_TAG_array_type &&
435 Tag != dwarf::DW_TAG_enumeration_type &&
436 Tag != dwarf::DW_TAG_subroutine_type &&
437 Tag != dwarf::DW_TAG_inheritance && Tag != dwarf::DW_TAG_friend &&
438 getFilename().empty())
440 // DIType is abstract, it should be a BasicType, a DerivedType or
443 DIBasicType(DbgNode).Verify();
444 else if (isCompositeType())
445 DICompositeType(DbgNode).Verify();
446 else if (isDerivedType())
447 DIDerivedType(DbgNode).Verify();
453 /// Verify - Verify that a basic type descriptor is well formed.
454 bool DIBasicType::Verify() const {
455 return isBasicType() && DbgNode->getNumOperands() == 10;
458 /// Verify - Verify that a derived type descriptor is well formed.
459 bool DIDerivedType::Verify() const {
460 // Make sure DerivedFrom @ field 9 is MDNode.
461 if (!fieldIsMDNode(DbgNode, 9))
463 if (getTag() == dwarf::DW_TAG_ptr_to_member_type)
464 // Make sure ClassType @ field 10 is MDNode.
465 if (!fieldIsMDNode(DbgNode, 10))
468 return isDerivedType() && DbgNode->getNumOperands() >= 10 &&
469 DbgNode->getNumOperands() <= 14;
472 /// Verify - Verify that a composite type descriptor is well formed.
473 bool DICompositeType::Verify() const {
474 if (!isCompositeType())
477 // Make sure DerivedFrom @ field 9 and ContainingType @ field 12 are MDNodes.
478 if (!fieldIsMDNode(DbgNode, 9))
480 if (!fieldIsMDNode(DbgNode, 12))
483 return DbgNode->getNumOperands() >= 10 && DbgNode->getNumOperands() <= 14;
486 /// Verify - Verify that a subprogram descriptor is well formed.
487 bool DISubprogram::Verify() const {
491 // Make sure context @ field 2 and type @ field 7 are MDNodes.
492 if (!fieldIsMDNode(DbgNode, 2))
494 if (!fieldIsMDNode(DbgNode, 7))
496 // Containing type @ field 12.
497 if (!fieldIsMDNode(DbgNode, 12))
499 return DbgNode->getNumOperands() == 20;
502 /// Verify - Verify that a global variable descriptor is well formed.
503 bool DIGlobalVariable::Verify() const {
504 if (!isGlobalVariable())
507 if (getDisplayName().empty())
509 // Make sure context @ field 2 and type @ field 8 are MDNodes.
510 if (!fieldIsMDNode(DbgNode, 2))
512 if (!fieldIsMDNode(DbgNode, 8))
514 // Make sure StaticDataMemberDeclaration @ field 12 is MDNode.
515 if (!fieldIsMDNode(DbgNode, 12))
518 return DbgNode->getNumOperands() == 13;
521 /// Verify - Verify that a variable descriptor is well formed.
522 bool DIVariable::Verify() const {
526 // Make sure context @ field 1 and type @ field 5 are MDNodes.
527 if (!fieldIsMDNode(DbgNode, 1))
529 if (!fieldIsMDNode(DbgNode, 5))
531 return DbgNode->getNumOperands() >= 8;
534 /// Verify - Verify that a location descriptor is well formed.
535 bool DILocation::Verify() const {
539 return DbgNode->getNumOperands() == 4;
542 /// Verify - Verify that a namespace descriptor is well formed.
543 bool DINameSpace::Verify() const {
546 return DbgNode->getNumOperands() == 5;
549 /// \brief Retrieve the MDNode for the directory/file pair.
550 MDNode *DIFile::getFileNode() const {
551 return getNodeField(DbgNode, 1);
554 /// \brief Verify that the file descriptor is well formed.
555 bool DIFile::Verify() const {
556 return isFile() && DbgNode->getNumOperands() == 2;
559 /// \brief Verify that the enumerator descriptor is well formed.
560 bool DIEnumerator::Verify() const {
561 return isEnumerator() && DbgNode->getNumOperands() == 3;
564 /// \brief Verify that the subrange descriptor is well formed.
565 bool DISubrange::Verify() const {
566 return isSubrange() && DbgNode->getNumOperands() == 3;
569 /// \brief Verify that the lexical block descriptor is well formed.
570 bool DILexicalBlock::Verify() const {
571 return isLexicalBlock() && DbgNode->getNumOperands() == 6;
574 /// \brief Verify that the file-scoped lexical block descriptor is well formed.
575 bool DILexicalBlockFile::Verify() const {
576 return isLexicalBlockFile() && DbgNode->getNumOperands() == 3;
579 /// \brief Verify that the template type parameter descriptor is well formed.
580 bool DITemplateTypeParameter::Verify() const {
581 return isTemplateTypeParameter() && DbgNode->getNumOperands() == 7;
584 /// \brief Verify that the template value parameter descriptor is well formed.
585 bool DITemplateValueParameter::Verify() const {
586 return isTemplateValueParameter() && DbgNode->getNumOperands() == 8;
589 /// \brief Verify that the imported module descriptor is well formed.
590 bool DIImportedEntity::Verify() const {
591 return isImportedEntity() &&
592 (DbgNode->getNumOperands() == 4 || DbgNode->getNumOperands() == 5);
595 /// getOriginalTypeSize - If this type is derived from a base type then
596 /// return base type size.
597 uint64_t DIDerivedType::getOriginalTypeSize() const {
598 unsigned Tag = getTag();
600 if (Tag != dwarf::DW_TAG_member && Tag != dwarf::DW_TAG_typedef &&
601 Tag != dwarf::DW_TAG_const_type && Tag != dwarf::DW_TAG_volatile_type &&
602 Tag != dwarf::DW_TAG_restrict_type)
603 return getSizeInBits();
605 DIType BaseType = getTypeDerivedFrom();
607 // If this type is not derived from any type then take conservative approach.
608 if (!BaseType.isValid())
609 return getSizeInBits();
611 // If this is a derived type, go ahead and get the base type, unless it's a
612 // reference then it's just the size of the field. Pointer types have no need
613 // of this since they're a different type of qualification on the type.
614 if (BaseType.getTag() == dwarf::DW_TAG_reference_type ||
615 BaseType.getTag() == dwarf::DW_TAG_rvalue_reference_type)
616 return getSizeInBits();
618 if (BaseType.isDerivedType())
619 return DIDerivedType(BaseType).getOriginalTypeSize();
621 return BaseType.getSizeInBits();
624 /// getObjCProperty - Return property node, if this ivar is associated with one.
625 MDNode *DIDerivedType::getObjCProperty() const {
626 return getNodeField(DbgNode, 10);
629 /// \brief Set the array of member DITypes.
630 void DICompositeType::setTypeArray(DIArray Elements, DIArray TParams) {
631 assert((!TParams || DbgNode->getNumOperands() == 14) &&
632 "If you're setting the template parameters this should include a slot "
634 TrackingVH<MDNode> N(*this);
635 N->replaceOperandWith(10, Elements);
637 N->replaceOperandWith(13, TParams);
641 /// \brief Set the containing type.
642 void DICompositeType::setContainingType(DICompositeType ContainingType) {
643 TrackingVH<MDNode> N(*this);
644 N->replaceOperandWith(12, ContainingType);
648 /// isInlinedFnArgument - Return true if this variable provides debugging
649 /// information for an inlined function arguments.
650 bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
651 assert(CurFn && "Invalid function");
652 if (!getContext().isSubprogram())
654 // This variable is not inlined function argument if its scope
655 // does not describe current function.
656 return !DISubprogram(getContext()).describes(CurFn);
659 /// describes - Return true if this subprogram provides debugging
660 /// information for the function F.
661 bool DISubprogram::describes(const Function *F) {
662 assert(F && "Invalid function");
663 if (F == getFunction())
665 StringRef Name = getLinkageName();
668 if (F->getName() == Name)
673 unsigned DISubprogram::isOptimized() const {
674 assert (DbgNode && "Invalid subprogram descriptor!");
675 if (DbgNode->getNumOperands() == 15)
676 return getUnsignedField(14);
680 MDNode *DISubprogram::getVariablesNodes() const {
681 return getNodeField(DbgNode, 18);
684 DIArray DISubprogram::getVariables() const {
685 return DIArray(getNodeField(DbgNode, 18));
688 Value *DITemplateValueParameter::getValue() const {
689 return getField(DbgNode, 4);
692 StringRef DIScope::getFilename() const {
695 return ::getStringField(getNodeField(DbgNode, 1), 0);
698 StringRef DIScope::getDirectory() const {
701 return ::getStringField(getNodeField(DbgNode, 1), 1);
704 DIArray DICompileUnit::getEnumTypes() const {
705 if (!DbgNode || DbgNode->getNumOperands() < 13)
708 return DIArray(getNodeField(DbgNode, 7));
711 DIArray DICompileUnit::getRetainedTypes() const {
712 if (!DbgNode || DbgNode->getNumOperands() < 13)
715 return DIArray(getNodeField(DbgNode, 8));
718 DIArray DICompileUnit::getSubprograms() const {
719 if (!DbgNode || DbgNode->getNumOperands() < 13)
722 return DIArray(getNodeField(DbgNode, 9));
726 DIArray DICompileUnit::getGlobalVariables() const {
727 if (!DbgNode || DbgNode->getNumOperands() < 13)
730 return DIArray(getNodeField(DbgNode, 10));
733 DIArray DICompileUnit::getImportedEntities() const {
734 if (!DbgNode || DbgNode->getNumOperands() < 13)
737 return DIArray(getNodeField(DbgNode, 11));
740 /// fixupSubprogramName - Replace contains special characters used
741 /// in a typical Objective-C names with '.' in a given string.
742 static void fixupSubprogramName(DISubprogram Fn, SmallVectorImpl<char> &Out) {
744 Fn.getFunction() ? Fn.getFunction()->getName() : Fn.getName();
745 FName = Function::getRealLinkageName(FName);
747 StringRef Prefix("llvm.dbg.lv.");
748 Out.reserve(FName.size() + Prefix.size());
749 Out.append(Prefix.begin(), Prefix.end());
751 bool isObjCLike = false;
752 for (size_t i = 0, e = FName.size(); i < e; ++i) {
757 if (isObjCLike && (C == '[' || C == ']' || C == ' ' || C == ':' ||
758 C == '+' || C == '(' || C == ')'))
765 /// getFnSpecificMDNode - Return a NameMDNode, if available, that is
766 /// suitable to hold function specific information.
767 NamedMDNode *llvm::getFnSpecificMDNode(const Module &M, DISubprogram Fn) {
768 SmallString<32> Name;
769 fixupSubprogramName(Fn, Name);
770 return M.getNamedMetadata(Name.str());
773 /// getOrInsertFnSpecificMDNode - Return a NameMDNode that is suitable
774 /// to hold function specific information.
775 NamedMDNode *llvm::getOrInsertFnSpecificMDNode(Module &M, DISubprogram Fn) {
776 SmallString<32> Name;
777 fixupSubprogramName(Fn, Name);
778 return M.getOrInsertNamedMetadata(Name.str());
781 /// createInlinedVariable - Create a new inlined variable based on current
783 /// @param DV Current Variable.
784 /// @param InlinedScope Location at current variable is inlined.
785 DIVariable llvm::createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
786 LLVMContext &VMContext) {
787 SmallVector<Value *, 16> Elts;
788 // Insert inlined scope as 7th element.
789 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
790 i == 7 ? Elts.push_back(InlinedScope) :
791 Elts.push_back(DV->getOperand(i));
792 return DIVariable(MDNode::get(VMContext, Elts));
795 /// cleanseInlinedVariable - Remove inlined scope from the variable.
796 DIVariable llvm::cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext) {
797 SmallVector<Value *, 16> Elts;
798 // Insert inlined scope as 7th element.
799 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
801 Elts.push_back(Constant::getNullValue(Type::getInt32Ty(VMContext))):
802 Elts.push_back(DV->getOperand(i));
803 return DIVariable(MDNode::get(VMContext, Elts));
806 /// getDISubprogram - Find subprogram that is enclosing this scope.
807 DISubprogram llvm::getDISubprogram(const MDNode *Scope) {
808 DIDescriptor D(Scope);
809 if (D.isSubprogram())
810 return DISubprogram(Scope);
812 if (D.isLexicalBlockFile())
813 return getDISubprogram(DILexicalBlockFile(Scope).getContext());
815 if (D.isLexicalBlock())
816 return getDISubprogram(DILexicalBlock(Scope).getContext());
818 return DISubprogram();
821 /// getDICompositeType - Find underlying composite type.
822 DICompositeType llvm::getDICompositeType(DIType T) {
823 if (T.isCompositeType())
824 return DICompositeType(T);
826 if (T.isDerivedType())
827 return getDICompositeType(DIDerivedType(T).getTypeDerivedFrom());
829 return DICompositeType();
832 /// isSubprogramContext - Return true if Context is either a subprogram
833 /// or another context nested inside a subprogram.
834 bool llvm::isSubprogramContext(const MDNode *Context) {
837 DIDescriptor D(Context);
838 if (D.isSubprogram())
841 return isSubprogramContext(DIType(Context).getContext());
845 //===----------------------------------------------------------------------===//
846 // DebugInfoFinder implementations.
847 //===----------------------------------------------------------------------===//
849 void DebugInfoFinder::reset() {
858 /// processModule - Process entire module and collect debug info.
859 void DebugInfoFinder::processModule(const Module &M) {
860 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
861 for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
862 DICompileUnit CU(CU_Nodes->getOperand(i));
864 DIArray GVs = CU.getGlobalVariables();
865 for (unsigned i = 0, e = GVs.getNumElements(); i != e; ++i) {
866 DIGlobalVariable DIG(GVs.getElement(i));
867 if (addGlobalVariable(DIG)) {
868 processScope(DIG.getContext());
869 processType(DIG.getType());
872 DIArray SPs = CU.getSubprograms();
873 for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i)
874 processSubprogram(DISubprogram(SPs.getElement(i)));
875 DIArray EnumTypes = CU.getEnumTypes();
876 for (unsigned i = 0, e = EnumTypes.getNumElements(); i != e; ++i)
877 processType(DIType(EnumTypes.getElement(i)));
878 DIArray RetainedTypes = CU.getRetainedTypes();
879 for (unsigned i = 0, e = RetainedTypes.getNumElements(); i != e; ++i)
880 processType(DIType(RetainedTypes.getElement(i)));
881 // FIXME: We really shouldn't be bailing out after visiting just one CU
887 /// processLocation - Process DILocation.
888 void DebugInfoFinder::processLocation(DILocation Loc) {
889 if (!Loc.Verify()) return;
890 DIDescriptor S(Loc.getScope());
891 if (S.isCompileUnit())
892 addCompileUnit(DICompileUnit(S));
893 else if (S.isSubprogram())
894 processSubprogram(DISubprogram(S));
895 else if (S.isLexicalBlock())
896 processLexicalBlock(DILexicalBlock(S));
897 else if (S.isLexicalBlockFile()) {
898 DILexicalBlockFile DBF = DILexicalBlockFile(S);
899 processLexicalBlock(DILexicalBlock(DBF.getScope()));
901 processLocation(Loc.getOrigLocation());
904 /// processType - Process DIType.
905 void DebugInfoFinder::processType(DIType DT) {
908 processScope(DT.getContext());
909 if (DT.isCompositeType()) {
910 DICompositeType DCT(DT);
911 processType(DCT.getTypeDerivedFrom());
912 DIArray DA = DCT.getTypeArray();
913 for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
914 DIDescriptor D = DA.getElement(i);
916 processType(DIType(D));
917 else if (D.isSubprogram())
918 processSubprogram(DISubprogram(D));
920 } else if (DT.isDerivedType()) {
921 DIDerivedType DDT(DT);
922 processType(DDT.getTypeDerivedFrom());
926 void DebugInfoFinder::processScope(DIScope Scope) {
927 if (Scope.isType()) {
932 if (Scope.isCompileUnit()) {
933 addCompileUnit(DICompileUnit(Scope));
936 if (Scope.isSubprogram()) {
937 processSubprogram(DISubprogram(Scope));
940 if (!addScope(Scope))
942 if (Scope.isLexicalBlock()) {
943 DILexicalBlock LB(Scope);
944 processScope(LB.getContext());
945 } else if (Scope.isLexicalBlockFile()) {
946 DILexicalBlockFile LBF = DILexicalBlockFile(Scope);
947 processScope(LBF.getScope());
948 } else if (Scope.isNameSpace()) {
949 DINameSpace NS(Scope);
950 processScope(NS.getContext());
954 /// processLexicalBlock
955 void DebugInfoFinder::processLexicalBlock(DILexicalBlock LB) {
956 DIScope Context = LB.getContext();
957 if (Context.isLexicalBlock())
958 return processLexicalBlock(DILexicalBlock(Context));
959 else if (Context.isLexicalBlockFile()) {
960 DILexicalBlockFile DBF = DILexicalBlockFile(Context);
961 return processLexicalBlock(DILexicalBlock(DBF.getScope()));
964 return processSubprogram(DISubprogram(Context));
967 /// processSubprogram - Process DISubprogram.
968 void DebugInfoFinder::processSubprogram(DISubprogram SP) {
969 if (!addSubprogram(SP))
971 processScope(SP.getContext());
972 processType(SP.getType());
975 /// processDeclare - Process DbgDeclareInst.
976 void DebugInfoFinder::processDeclare(const DbgDeclareInst *DDI) {
977 MDNode *N = dyn_cast<MDNode>(DDI->getVariable());
981 if (!DV.isVariable())
984 if (!NodesSeen.insert(DV))
986 processScope(DIVariable(N).getContext());
987 processType(DIVariable(N).getType());
990 void DebugInfoFinder::processValue(const DbgValueInst *DVI) {
991 MDNode *N = dyn_cast<MDNode>(DVI->getVariable());
995 if (!DV.isVariable())
998 if (!NodesSeen.insert(DV))
1000 processScope(DIVariable(N).getContext());
1001 processType(DIVariable(N).getType());
1004 /// addType - Add type into Tys.
1005 bool DebugInfoFinder::addType(DIType DT) {
1009 if (!NodesSeen.insert(DT))
1016 /// addCompileUnit - Add compile unit into CUs.
1017 bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
1021 if (!NodesSeen.insert(CU))
1028 /// addGlobalVariable - Add global variable into GVs.
1029 bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
1030 if (!DIDescriptor(DIG).isGlobalVariable())
1033 if (!NodesSeen.insert(DIG))
1040 // addSubprogram - Add subprgoram into SPs.
1041 bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
1042 if (!DIDescriptor(SP).isSubprogram())
1045 if (!NodesSeen.insert(SP))
1052 bool DebugInfoFinder::addScope(DIScope Scope) {
1055 if (!NodesSeen.insert(Scope))
1057 Scopes.push_back(Scope);
1061 //===----------------------------------------------------------------------===//
1062 // DIDescriptor: dump routines for all descriptors.
1063 //===----------------------------------------------------------------------===//
1065 /// dump - Print descriptor to dbgs() with a newline.
1066 void DIDescriptor::dump() const {
1067 print(dbgs()); dbgs() << '\n';
1070 /// print - Print descriptor.
1071 void DIDescriptor::print(raw_ostream &OS) const {
1072 if (!DbgNode) return;
1074 if (const char *Tag = dwarf::TagString(getTag()))
1075 OS << "[ " << Tag << " ]";
1077 if (this->isSubrange()) {
1078 DISubrange(DbgNode).printInternal(OS);
1079 } else if (this->isCompileUnit()) {
1080 DICompileUnit(DbgNode).printInternal(OS);
1081 } else if (this->isFile()) {
1082 DIFile(DbgNode).printInternal(OS);
1083 } else if (this->isEnumerator()) {
1084 DIEnumerator(DbgNode).printInternal(OS);
1085 } else if (this->isBasicType()) {
1086 DIType(DbgNode).printInternal(OS);
1087 } else if (this->isDerivedType()) {
1088 DIDerivedType(DbgNode).printInternal(OS);
1089 } else if (this->isCompositeType()) {
1090 DICompositeType(DbgNode).printInternal(OS);
1091 } else if (this->isSubprogram()) {
1092 DISubprogram(DbgNode).printInternal(OS);
1093 } else if (this->isGlobalVariable()) {
1094 DIGlobalVariable(DbgNode).printInternal(OS);
1095 } else if (this->isVariable()) {
1096 DIVariable(DbgNode).printInternal(OS);
1097 } else if (this->isObjCProperty()) {
1098 DIObjCProperty(DbgNode).printInternal(OS);
1099 } else if (this->isNameSpace()) {
1100 DINameSpace(DbgNode).printInternal(OS);
1101 } else if (this->isScope()) {
1102 DIScope(DbgNode).printInternal(OS);
1106 void DISubrange::printInternal(raw_ostream &OS) const {
1107 int64_t Count = getCount();
1109 OS << " [" << getLo() << ", " << Count - 1 << ']';
1111 OS << " [unbounded]";
1114 void DIScope::printInternal(raw_ostream &OS) const {
1115 OS << " [" << getDirectory() << "/" << getFilename() << ']';
1118 void DICompileUnit::printInternal(raw_ostream &OS) const {
1119 DIScope::printInternal(OS);
1121 unsigned Lang = getLanguage();
1122 if (const char *LangStr = dwarf::LanguageString(Lang))
1125 (OS << "lang 0x").write_hex(Lang);
1129 void DIEnumerator::printInternal(raw_ostream &OS) const {
1130 OS << " [" << getName() << " :: " << getEnumValue() << ']';
1133 void DIType::printInternal(raw_ostream &OS) const {
1134 if (!DbgNode) return;
1136 StringRef Res = getName();
1138 OS << " [" << Res << "]";
1140 // TODO: Print context?
1142 OS << " [line " << getLineNumber()
1143 << ", size " << getSizeInBits()
1144 << ", align " << getAlignInBits()
1145 << ", offset " << getOffsetInBits();
1147 if (const char *Enc =
1148 dwarf::AttributeEncodingString(DIBasicType(DbgNode).getEncoding()))
1149 OS << ", enc " << Enc;
1154 else if (isProtected())
1155 OS << " [protected]";
1158 OS << " [artificial]";
1160 if (isForwardDecl())
1162 else if (getTag() == dwarf::DW_TAG_structure_type ||
1163 getTag() == dwarf::DW_TAG_union_type ||
1164 getTag() == dwarf::DW_TAG_enumeration_type ||
1165 getTag() == dwarf::DW_TAG_class_type)
1169 if (isStaticMember())
1173 void DIDerivedType::printInternal(raw_ostream &OS) const {
1174 DIType::printInternal(OS);
1175 OS << " [from " << getTypeDerivedFrom().getName() << ']';
1178 void DICompositeType::printInternal(raw_ostream &OS) const {
1179 DIType::printInternal(OS);
1180 DIArray A = getTypeArray();
1181 OS << " [" << A.getNumElements() << " elements]";
1184 void DINameSpace::printInternal(raw_ostream &OS) const {
1185 StringRef Name = getName();
1187 OS << " [" << Name << ']';
1189 OS << " [line " << getLineNumber() << ']';
1192 void DISubprogram::printInternal(raw_ostream &OS) const {
1193 // TODO : Print context
1194 OS << " [line " << getLineNumber() << ']';
1196 if (isLocalToUnit())
1202 if (getScopeLineNumber() != getLineNumber())
1203 OS << " [scope " << getScopeLineNumber() << "]";
1207 else if (isProtected())
1208 OS << " [protected]";
1210 StringRef Res = getName();
1212 OS << " [" << Res << ']';
1215 void DIGlobalVariable::printInternal(raw_ostream &OS) const {
1216 StringRef Res = getName();
1218 OS << " [" << Res << ']';
1220 OS << " [line " << getLineNumber() << ']';
1222 // TODO : Print context
1224 if (isLocalToUnit())
1231 void DIVariable::printInternal(raw_ostream &OS) const {
1232 StringRef Res = getName();
1234 OS << " [" << Res << ']';
1236 OS << " [line " << getLineNumber() << ']';
1239 void DIObjCProperty::printInternal(raw_ostream &OS) const {
1240 StringRef Name = getObjCPropertyName();
1242 OS << " [" << Name << ']';
1244 OS << " [line " << getLineNumber()
1245 << ", properties " << getUnsignedField(6) << ']';
1248 static void printDebugLoc(DebugLoc DL, raw_ostream &CommentOS,
1249 const LLVMContext &Ctx) {
1250 if (!DL.isUnknown()) { // Print source line info.
1251 DIScope Scope(DL.getScope(Ctx));
1252 assert(Scope.isScope() &&
1253 "Scope of a DebugLoc should be a DIScope.");
1254 // Omit the directory, because it's likely to be long and uninteresting.
1255 CommentOS << Scope.getFilename();
1256 CommentOS << ':' << DL.getLine();
1257 if (DL.getCol() != 0)
1258 CommentOS << ':' << DL.getCol();
1259 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(DL.getInlinedAt(Ctx));
1260 if (!InlinedAtDL.isUnknown()) {
1261 CommentOS << " @[ ";
1262 printDebugLoc(InlinedAtDL, CommentOS, Ctx);
1268 void DIVariable::printExtendedName(raw_ostream &OS) const {
1269 const LLVMContext &Ctx = DbgNode->getContext();
1270 StringRef Res = getName();
1272 OS << Res << "," << getLineNumber();
1273 if (MDNode *InlinedAt = getInlinedAt()) {
1274 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(InlinedAt);
1275 if (!InlinedAtDL.isUnknown()) {
1277 printDebugLoc(InlinedAtDL, OS, Ctx);