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/Analysis/DebugInfo.h"
16 #include "llvm/Constants.h"
17 #include "llvm/DerivedTypes.h"
18 #include "llvm/Intrinsics.h"
19 #include "llvm/IntrinsicInst.h"
20 #include "llvm/Instructions.h"
21 #include "llvm/Module.h"
22 #include "llvm/Analysis/ValueTracking.h"
23 #include "llvm/ADT/SmallPtrSet.h"
24 #include "llvm/ADT/SmallString.h"
25 #include "llvm/ADT/STLExtras.h"
26 #include "llvm/Support/Debug.h"
27 #include "llvm/Support/Dwarf.h"
28 #include "llvm/Support/raw_ostream.h"
30 using namespace llvm::dwarf;
32 //===----------------------------------------------------------------------===//
34 //===----------------------------------------------------------------------===//
36 DIDescriptor::DIDescriptor(const DIFile F) : DbgNode(F.DbgNode) {
39 DIDescriptor::DIDescriptor(const DISubprogram F) : DbgNode(F.DbgNode) {
42 DIDescriptor::DIDescriptor(const DILexicalBlockFile F) : DbgNode(F.DbgNode) {
45 DIDescriptor::DIDescriptor(const DILexicalBlock F) : DbgNode(F.DbgNode) {
48 DIDescriptor::DIDescriptor(const DIVariable F) : DbgNode(F.DbgNode) {
51 DIDescriptor::DIDescriptor(const DIType F) : DbgNode(F.DbgNode) {
55 DIDescriptor::getStringField(unsigned Elt) const {
59 if (Elt < DbgNode->getNumOperands())
60 if (MDString *MDS = dyn_cast_or_null<MDString>(DbgNode->getOperand(Elt)))
61 return MDS->getString();
66 uint64_t DIDescriptor::getUInt64Field(unsigned Elt) const {
70 if (Elt < DbgNode->getNumOperands())
71 if (ConstantInt *CI = dyn_cast<ConstantInt>(DbgNode->getOperand(Elt)))
72 return CI->getZExtValue();
77 DIDescriptor DIDescriptor::getDescriptorField(unsigned Elt) const {
79 return DIDescriptor();
81 if (Elt < DbgNode->getNumOperands())
83 DIDescriptor(dyn_cast_or_null<const MDNode>(DbgNode->getOperand(Elt)));
84 return DIDescriptor();
87 GlobalVariable *DIDescriptor::getGlobalVariableField(unsigned Elt) const {
91 if (Elt < DbgNode->getNumOperands())
92 return dyn_cast_or_null<GlobalVariable>(DbgNode->getOperand(Elt));
96 Constant *DIDescriptor::getConstantField(unsigned Elt) const {
100 if (Elt < DbgNode->getNumOperands())
101 return dyn_cast_or_null<Constant>(DbgNode->getOperand(Elt));
105 Function *DIDescriptor::getFunctionField(unsigned Elt) const {
109 if (Elt < DbgNode->getNumOperands())
110 return dyn_cast_or_null<Function>(DbgNode->getOperand(Elt));
114 unsigned DIVariable::getNumAddrElements() const {
115 if (getVersion() <= llvm::LLVMDebugVersion8)
116 return DbgNode->getNumOperands()-6;
117 if (getVersion() == llvm::LLVMDebugVersion9)
118 return DbgNode->getNumOperands()-7;
119 return DbgNode->getNumOperands()-8;
122 /// getInlinedAt - If this variable is inlined then return inline location.
123 MDNode *DIVariable::getInlinedAt() const {
124 if (getVersion() <= llvm::LLVMDebugVersion9)
126 return dyn_cast_or_null<MDNode>(DbgNode->getOperand(7));
129 //===----------------------------------------------------------------------===//
131 //===----------------------------------------------------------------------===//
133 /// isBasicType - Return true if the specified tag is legal for
135 bool DIDescriptor::isBasicType() const {
136 if (!DbgNode) return false;
138 case dwarf::DW_TAG_base_type:
139 case dwarf::DW_TAG_unspecified_type:
146 /// isDerivedType - Return true if the specified tag is legal for DIDerivedType.
147 bool DIDescriptor::isDerivedType() const {
148 if (!DbgNode) return false;
150 case dwarf::DW_TAG_typedef:
151 case dwarf::DW_TAG_pointer_type:
152 case dwarf::DW_TAG_reference_type:
153 case dwarf::DW_TAG_const_type:
154 case dwarf::DW_TAG_volatile_type:
155 case dwarf::DW_TAG_restrict_type:
156 case dwarf::DW_TAG_member:
157 case dwarf::DW_TAG_inheritance:
158 case dwarf::DW_TAG_friend:
161 // CompositeTypes are currently modelled as DerivedTypes.
162 return isCompositeType();
166 /// isCompositeType - Return true if the specified tag is legal for
168 bool DIDescriptor::isCompositeType() const {
169 if (!DbgNode) return false;
171 case dwarf::DW_TAG_array_type:
172 case dwarf::DW_TAG_structure_type:
173 case dwarf::DW_TAG_union_type:
174 case dwarf::DW_TAG_enumeration_type:
175 case dwarf::DW_TAG_vector_type:
176 case dwarf::DW_TAG_subroutine_type:
177 case dwarf::DW_TAG_class_type:
184 /// isVariable - Return true if the specified tag is legal for DIVariable.
185 bool DIDescriptor::isVariable() const {
186 if (!DbgNode) return false;
188 case dwarf::DW_TAG_auto_variable:
189 case dwarf::DW_TAG_arg_variable:
190 case dwarf::DW_TAG_return_variable:
197 /// isType - Return true if the specified tag is legal for DIType.
198 bool DIDescriptor::isType() const {
199 return isBasicType() || isCompositeType() || isDerivedType();
202 /// isSubprogram - Return true if the specified tag is legal for
204 bool DIDescriptor::isSubprogram() const {
205 return DbgNode && getTag() == dwarf::DW_TAG_subprogram;
208 /// isGlobalVariable - Return true if the specified tag is legal for
209 /// DIGlobalVariable.
210 bool DIDescriptor::isGlobalVariable() const {
211 return DbgNode && (getTag() == dwarf::DW_TAG_variable ||
212 getTag() == dwarf::DW_TAG_constant);
215 /// isGlobal - Return true if the specified tag is legal for DIGlobal.
216 bool DIDescriptor::isGlobal() const {
217 return isGlobalVariable();
220 /// isUnspecifiedParmeter - Return true if the specified tag is
221 /// DW_TAG_unspecified_parameters.
222 bool DIDescriptor::isUnspecifiedParameter() const {
223 return DbgNode && getTag() == dwarf::DW_TAG_unspecified_parameters;
226 /// isScope - Return true if the specified tag is one of the scope
228 bool DIDescriptor::isScope() const {
229 if (!DbgNode) return false;
231 case dwarf::DW_TAG_compile_unit:
232 case dwarf::DW_TAG_lexical_block:
233 case dwarf::DW_TAG_subprogram:
234 case dwarf::DW_TAG_namespace:
242 /// isTemplateTypeParameter - Return true if the specified tag is
243 /// DW_TAG_template_type_parameter.
244 bool DIDescriptor::isTemplateTypeParameter() const {
245 return DbgNode && getTag() == dwarf::DW_TAG_template_type_parameter;
248 /// isTemplateValueParameter - Return true if the specified tag is
249 /// DW_TAG_template_value_parameter.
250 bool DIDescriptor::isTemplateValueParameter() const {
251 return DbgNode && getTag() == dwarf::DW_TAG_template_value_parameter;
254 /// isCompileUnit - Return true if the specified tag is DW_TAG_compile_unit.
255 bool DIDescriptor::isCompileUnit() const {
256 return DbgNode && getTag() == dwarf::DW_TAG_compile_unit;
259 /// isFile - Return true if the specified tag is DW_TAG_file_type.
260 bool DIDescriptor::isFile() const {
261 return DbgNode && getTag() == dwarf::DW_TAG_file_type;
264 /// isNameSpace - Return true if the specified tag is DW_TAG_namespace.
265 bool DIDescriptor::isNameSpace() const {
266 return DbgNode && getTag() == dwarf::DW_TAG_namespace;
269 /// isLexicalBlockFile - Return true if the specified descriptor is a
270 /// lexical block with an extra file.
271 bool DIDescriptor::isLexicalBlockFile() const {
272 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
273 (DbgNode->getNumOperands() == 3);
276 /// isLexicalBlock - Return true if the specified tag is DW_TAG_lexical_block.
277 bool DIDescriptor::isLexicalBlock() const {
278 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
279 (DbgNode->getNumOperands() > 3);
282 /// isSubrange - Return true if the specified tag is DW_TAG_subrange_type.
283 bool DIDescriptor::isSubrange() const {
284 return DbgNode && getTag() == dwarf::DW_TAG_subrange_type;
287 /// isEnumerator - Return true if the specified tag is DW_TAG_enumerator.
288 bool DIDescriptor::isEnumerator() const {
289 return DbgNode && getTag() == dwarf::DW_TAG_enumerator;
292 /// isObjCProperty - Return true if the specified tag is DW_TAG
293 bool DIDescriptor::isObjCProperty() const {
294 return DbgNode && getTag() == dwarf::DW_TAG_APPLE_Property;
296 //===----------------------------------------------------------------------===//
297 // Simple Descriptor Constructors and other Methods
298 //===----------------------------------------------------------------------===//
300 DIType::DIType(const MDNode *N) : DIScope(N) {
302 if (!isBasicType() && !isDerivedType() && !isCompositeType()) {
307 unsigned DIArray::getNumElements() const {
310 return DbgNode->getNumOperands();
313 /// replaceAllUsesWith - Replace all uses of debug info referenced by
315 void DIType::replaceAllUsesWith(DIDescriptor &D) {
319 // Since we use a TrackingVH for the node, its easy for clients to manufacture
320 // legitimate situations where they want to replaceAllUsesWith() on something
321 // which, due to uniquing, has merged with the source. We shield clients from
322 // this detail by allowing a value to be replaced with replaceAllUsesWith()
325 MDNode *Node = const_cast<MDNode*>(DbgNode);
326 const MDNode *DN = D;
327 const Value *V = cast_or_null<Value>(DN);
328 Node->replaceAllUsesWith(const_cast<Value*>(V));
329 MDNode::deleteTemporary(Node);
333 /// replaceAllUsesWith - Replace all uses of debug info referenced by
335 void DIType::replaceAllUsesWith(MDNode *D) {
339 // Since we use a TrackingVH for the node, its easy for clients to manufacture
340 // legitimate situations where they want to replaceAllUsesWith() on something
341 // which, due to uniquing, has merged with the source. We shield clients from
342 // this detail by allowing a value to be replaced with replaceAllUsesWith()
345 MDNode *Node = const_cast<MDNode*>(DbgNode);
346 const MDNode *DN = D;
347 const Value *V = cast_or_null<Value>(DN);
348 Node->replaceAllUsesWith(const_cast<Value*>(V));
349 MDNode::deleteTemporary(Node);
353 /// isUnsignedDIType - Return true if type encoding is unsigned.
354 bool DIType::isUnsignedDIType() {
355 DIDerivedType DTy(DbgNode);
357 return DTy.getTypeDerivedFrom().isUnsignedDIType();
359 DIBasicType BTy(DbgNode);
361 unsigned Encoding = BTy.getEncoding();
362 if (Encoding == dwarf::DW_ATE_unsigned ||
363 Encoding == dwarf::DW_ATE_unsigned_char)
369 /// Verify - Verify that a compile unit is well formed.
370 bool DICompileUnit::Verify() const {
373 StringRef N = getFilename();
376 // It is possible that directory and produce string is empty.
380 /// Verify - Verify that a type descriptor is well formed.
381 bool DIType::Verify() const {
384 if (getContext() && !getContext().Verify())
386 unsigned Tag = getTag();
387 if (!isBasicType() && Tag != dwarf::DW_TAG_const_type &&
388 Tag != dwarf::DW_TAG_volatile_type && Tag != dwarf::DW_TAG_pointer_type &&
389 Tag != dwarf::DW_TAG_reference_type && Tag != dwarf::DW_TAG_restrict_type
390 && Tag != dwarf::DW_TAG_vector_type && Tag != dwarf::DW_TAG_array_type
391 && Tag != dwarf::DW_TAG_enumeration_type
392 && Tag != dwarf::DW_TAG_subroutine_type
393 && getFilename().empty())
398 /// Verify - Verify that a basic type descriptor is well formed.
399 bool DIBasicType::Verify() const {
400 return isBasicType();
403 /// Verify - Verify that a derived type descriptor is well formed.
404 bool DIDerivedType::Verify() const {
405 return isDerivedType();
408 /// Verify - Verify that a composite type descriptor is well formed.
409 bool DICompositeType::Verify() const {
412 if (getContext() && !getContext().Verify())
418 /// Verify - Verify that a subprogram descriptor is well formed.
419 bool DISubprogram::Verify() const {
423 if (getContext() && !getContext().Verify())
426 DICompositeType Ty = getType();
432 /// Verify - Verify that a global variable descriptor is well formed.
433 bool DIGlobalVariable::Verify() const {
437 if (getDisplayName().empty())
440 if (getContext() && !getContext().Verify())
443 DIType Ty = getType();
447 if (!getGlobal() && !getConstant())
453 /// Verify - Verify that a variable descriptor is well formed.
454 bool DIVariable::Verify() const {
458 if (getContext() && !getContext().Verify())
461 DIType Ty = getType();
468 /// Verify - Verify that a location descriptor is well formed.
469 bool DILocation::Verify() const {
473 return DbgNode->getNumOperands() == 4;
476 /// Verify - Verify that a namespace descriptor is well formed.
477 bool DINameSpace::Verify() const {
480 if (getName().empty())
485 /// getOriginalTypeSize - If this type is derived from a base type then
486 /// return base type size.
487 uint64_t DIDerivedType::getOriginalTypeSize() const {
488 unsigned Tag = getTag();
490 if (Tag == dwarf::DW_TAG_member || Tag == dwarf::DW_TAG_typedef ||
491 Tag == dwarf::DW_TAG_const_type || Tag == dwarf::DW_TAG_volatile_type ||
492 Tag == dwarf::DW_TAG_restrict_type) {
493 DIType BaseType = getTypeDerivedFrom();
494 // If this type is not derived from any type then take conservative
496 if (!BaseType.isValid())
497 return getSizeInBits();
498 // If this is a derived type, go ahead and get the base type, unless
499 // it's a reference then it's just the size of the field. Pointer types
500 // have no need of this since they're a different type of qualification
502 if (BaseType.getTag() == dwarf::DW_TAG_reference_type)
503 return getSizeInBits();
504 else if (BaseType.isDerivedType())
505 return DIDerivedType(BaseType).getOriginalTypeSize();
507 return BaseType.getSizeInBits();
510 return getSizeInBits();
513 /// isInlinedFnArgument - Return true if this variable provides debugging
514 /// information for an inlined function arguments.
515 bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
516 assert(CurFn && "Invalid function");
517 if (!getContext().isSubprogram())
519 // This variable is not inlined function argument if its scope
520 // does not describe current function.
521 return !(DISubprogram(getContext()).describes(CurFn));
524 /// describes - Return true if this subprogram provides debugging
525 /// information for the function F.
526 bool DISubprogram::describes(const Function *F) {
527 assert(F && "Invalid function");
528 if (F == getFunction())
530 StringRef Name = getLinkageName();
533 if (F->getName() == Name)
538 unsigned DISubprogram::isOptimized() const {
539 assert (DbgNode && "Invalid subprogram descriptor!");
540 if (DbgNode->getNumOperands() == 16)
541 return getUnsignedField(15);
545 MDNode *DISubprogram::getVariablesNodes() const {
546 if (!DbgNode || DbgNode->getNumOperands() <= 19)
548 if (MDNode *Temp = dyn_cast_or_null<MDNode>(DbgNode->getOperand(19)))
549 return dyn_cast_or_null<MDNode>(Temp->getOperand(0));
553 DIArray DISubprogram::getVariables() const {
554 if (!DbgNode || DbgNode->getNumOperands() <= 19)
556 if (MDNode *T = dyn_cast_or_null<MDNode>(DbgNode->getOperand(19)))
557 if (MDNode *A = dyn_cast_or_null<MDNode>(T->getOperand(0)))
562 StringRef DIScope::getFilename() const {
565 if (isLexicalBlockFile())
566 return DILexicalBlockFile(DbgNode).getFilename();
567 if (isLexicalBlock())
568 return DILexicalBlock(DbgNode).getFilename();
570 return DISubprogram(DbgNode).getFilename();
572 return DICompileUnit(DbgNode).getFilename();
574 return DINameSpace(DbgNode).getFilename();
576 return DIType(DbgNode).getFilename();
578 return DIFile(DbgNode).getFilename();
579 assert(0 && "Invalid DIScope!");
583 StringRef DIScope::getDirectory() const {
586 if (isLexicalBlockFile())
587 return DILexicalBlockFile(DbgNode).getDirectory();
588 if (isLexicalBlock())
589 return DILexicalBlock(DbgNode).getDirectory();
591 return DISubprogram(DbgNode).getDirectory();
593 return DICompileUnit(DbgNode).getDirectory();
595 return DINameSpace(DbgNode).getDirectory();
597 return DIType(DbgNode).getDirectory();
599 return DIFile(DbgNode).getDirectory();
600 assert(0 && "Invalid DIScope!");
604 DIArray DICompileUnit::getEnumTypes() const {
605 if (!DbgNode || DbgNode->getNumOperands() < 14)
608 if (MDNode *N = dyn_cast_or_null<MDNode>(DbgNode->getOperand(10)))
609 if (MDNode *A = dyn_cast_or_null<MDNode>(N->getOperand(0)))
614 DIArray DICompileUnit::getRetainedTypes() const {
615 if (!DbgNode || DbgNode->getNumOperands() < 14)
618 if (MDNode *N = dyn_cast_or_null<MDNode>(DbgNode->getOperand(11)))
619 if (MDNode *A = dyn_cast_or_null<MDNode>(N->getOperand(0)))
624 DIArray DICompileUnit::getSubprograms() const {
625 if (!DbgNode || DbgNode->getNumOperands() < 14)
628 if (MDNode *N = dyn_cast_or_null<MDNode>(DbgNode->getOperand(12)))
629 if (MDNode *A = dyn_cast_or_null<MDNode>(N->getOperand(0)))
635 DIArray DICompileUnit::getGlobalVariables() const {
636 if (!DbgNode || DbgNode->getNumOperands() < 14)
639 if (MDNode *N = dyn_cast_or_null<MDNode>(DbgNode->getOperand(13)))
640 if (MDNode *A = dyn_cast_or_null<MDNode>(N->getOperand(0)))
645 //===----------------------------------------------------------------------===//
646 // DIDescriptor: vtable anchors for all descriptors.
647 //===----------------------------------------------------------------------===//
649 void DIScope::anchor() { }
651 void DICompileUnit::anchor() { }
653 void DIFile::anchor() { }
655 void DIType::anchor() { }
657 void DIBasicType::anchor() { }
659 void DIDerivedType::anchor() { }
661 void DICompositeType::anchor() { }
663 void DISubprogram::anchor() { }
665 void DILexicalBlock::anchor() { }
667 void DINameSpace::anchor() { }
669 void DILexicalBlockFile::anchor() { }
671 //===----------------------------------------------------------------------===//
672 // DIDescriptor: dump routines for all descriptors.
673 //===----------------------------------------------------------------------===//
676 /// print - Print descriptor.
677 void DIDescriptor::print(raw_ostream &OS) const {
678 OS << "[" << dwarf::TagString(getTag()) << "] ";
679 OS.write_hex((intptr_t) &*DbgNode) << ']';
682 /// print - Print compile unit.
683 void DICompileUnit::print(raw_ostream &OS) const {
685 OS << " [" << dwarf::LanguageString(getLanguage()) << "] ";
687 OS << " [" << getDirectory() << "/" << getFilename() << "]";
690 /// print - Print type.
691 void DIType::print(raw_ostream &OS) const {
692 if (!DbgNode) return;
694 StringRef Res = getName();
696 OS << " [" << Res << "] ";
698 unsigned Tag = getTag();
699 OS << " [" << dwarf::TagString(Tag) << "] ";
701 // TODO : Print context
703 << "line " << getLineNumber() << ", "
704 << getSizeInBits() << " bits, "
705 << getAlignInBits() << " bit alignment, "
706 << getOffsetInBits() << " bit offset"
711 else if (isProtected())
712 OS << " [protected] ";
718 DIBasicType(DbgNode).print(OS);
719 else if (isDerivedType())
720 DIDerivedType(DbgNode).print(OS);
721 else if (isCompositeType())
722 DICompositeType(DbgNode).print(OS);
724 OS << "Invalid DIType\n";
731 /// print - Print basic type.
732 void DIBasicType::print(raw_ostream &OS) const {
733 OS << " [" << dwarf::AttributeEncodingString(getEncoding()) << "] ";
736 /// print - Print derived type.
737 void DIDerivedType::print(raw_ostream &OS) const {
738 OS << "\n\t Derived From: "; getTypeDerivedFrom().print(OS);
741 /// print - Print composite type.
742 void DICompositeType::print(raw_ostream &OS) const {
743 DIArray A = getTypeArray();
744 OS << " [" << A.getNumElements() << " elements]";
747 /// print - Print subprogram.
748 void DISubprogram::print(raw_ostream &OS) const {
749 StringRef Res = getName();
751 OS << " [" << Res << "] ";
753 unsigned Tag = getTag();
754 OS << " [" << dwarf::TagString(Tag) << "] ";
756 // TODO : Print context
757 OS << " [" << getLineNumber() << "] ";
768 /// print - Print global variable.
769 void DIGlobalVariable::print(raw_ostream &OS) const {
771 StringRef Res = getName();
773 OS << " [" << Res << "] ";
775 unsigned Tag = getTag();
776 OS << " [" << dwarf::TagString(Tag) << "] ";
778 // TODO : Print context
779 OS << " [" << getLineNumber() << "] ";
787 if (isGlobalVariable())
788 DIGlobalVariable(DbgNode).print(OS);
792 static void printDebugLoc(DebugLoc DL, raw_ostream &CommentOS,
793 const LLVMContext &Ctx) {
794 if (!DL.isUnknown()) { // Print source line info.
795 DIScope Scope(DL.getScope(Ctx));
796 // Omit the directory, because it's likely to be long and uninteresting.
798 CommentOS << Scope.getFilename();
800 CommentOS << "<unknown>";
801 CommentOS << ':' << DL.getLine();
802 if (DL.getCol() != 0)
803 CommentOS << ':' << DL.getCol();
804 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(DL.getInlinedAt(Ctx));
805 if (!InlinedAtDL.isUnknown()) {
807 printDebugLoc(InlinedAtDL, CommentOS, Ctx);
813 void DIVariable::printExtendedName(raw_ostream &OS) const {
814 const LLVMContext &Ctx = DbgNode->getContext();
815 StringRef Res = getName();
817 OS << Res << "," << getLineNumber();
818 if (MDNode *InlinedAt = getInlinedAt()) {
819 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(InlinedAt);
820 if (!InlinedAtDL.isUnknown()) {
822 printDebugLoc(InlinedAtDL, OS, Ctx);
828 /// print - Print variable.
829 void DIVariable::print(raw_ostream &OS) const {
830 StringRef Res = getName();
832 OS << " [" << Res << "] ";
834 OS << " [" << getLineNumber() << "] ";
838 // FIXME: Dump complex addresses
841 /// dump - Print descriptor to dbgs() with a newline.
842 void DIDescriptor::dump() const {
843 print(dbgs()); dbgs() << '\n';
846 /// dump - Print compile unit to dbgs() with a newline.
847 void DICompileUnit::dump() const {
848 print(dbgs()); dbgs() << '\n';
851 /// dump - Print type to dbgs() with a newline.
852 void DIType::dump() const {
853 print(dbgs()); dbgs() << '\n';
856 /// dump - Print basic type to dbgs() with a newline.
857 void DIBasicType::dump() const {
858 print(dbgs()); dbgs() << '\n';
861 /// dump - Print derived type to dbgs() with a newline.
862 void DIDerivedType::dump() const {
863 print(dbgs()); dbgs() << '\n';
866 /// dump - Print composite type to dbgs() with a newline.
867 void DICompositeType::dump() const {
868 print(dbgs()); dbgs() << '\n';
871 /// dump - Print subprogram to dbgs() with a newline.
872 void DISubprogram::dump() const {
873 print(dbgs()); dbgs() << '\n';
876 /// dump - Print global variable.
877 void DIGlobalVariable::dump() const {
878 print(dbgs()); dbgs() << '\n';
881 /// dump - Print variable.
882 void DIVariable::dump() const {
883 print(dbgs()); dbgs() << '\n';
886 /// fixupObjcLikeName - Replace contains special characters used
887 /// in a typical Objective-C names with '.' in a given string.
888 static void fixupObjcLikeName(StringRef Str, SmallVectorImpl<char> &Out) {
889 bool isObjCLike = false;
890 for (size_t i = 0, e = Str.size(); i < e; ++i) {
895 if (isObjCLike && (C == '[' || C == ']' || C == ' ' || C == ':' ||
896 C == '+' || C == '(' || C == ')'))
903 /// getFnSpecificMDNode - Return a NameMDNode, if available, that is
904 /// suitable to hold function specific information.
905 NamedMDNode *llvm::getFnSpecificMDNode(const Module &M, DISubprogram Fn) {
906 SmallString<32> Name = StringRef("llvm.dbg.lv.");
907 StringRef FName = "fn";
908 if (Fn.getFunction())
909 FName = Fn.getFunction()->getName();
911 FName = Fn.getName();
913 if (FName.startswith(StringRef(&One, 1)))
914 FName = FName.substr(1);
915 fixupObjcLikeName(FName, Name);
916 return M.getNamedMetadata(Name.str());
919 /// getOrInsertFnSpecificMDNode - Return a NameMDNode that is suitable
920 /// to hold function specific information.
921 NamedMDNode *llvm::getOrInsertFnSpecificMDNode(Module &M, DISubprogram Fn) {
922 SmallString<32> Name = StringRef("llvm.dbg.lv.");
923 StringRef FName = "fn";
924 if (Fn.getFunction())
925 FName = Fn.getFunction()->getName();
927 FName = Fn.getName();
929 if (FName.startswith(StringRef(&One, 1)))
930 FName = FName.substr(1);
931 fixupObjcLikeName(FName, Name);
933 return M.getOrInsertNamedMetadata(Name.str());
936 /// createInlinedVariable - Create a new inlined variable based on current
938 /// @param DV Current Variable.
939 /// @param InlinedScope Location at current variable is inlined.
940 DIVariable llvm::createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
941 LLVMContext &VMContext) {
942 SmallVector<Value *, 16> Elts;
943 // Insert inlined scope as 7th element.
944 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
945 i == 7 ? Elts.push_back(InlinedScope) :
946 Elts.push_back(DV->getOperand(i));
947 return DIVariable(MDNode::get(VMContext, Elts));
950 /// cleanseInlinedVariable - Remove inlined scope from the variable.
951 DIVariable llvm::cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext) {
952 SmallVector<Value *, 16> Elts;
953 // Insert inlined scope as 7th element.
954 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
956 Elts.push_back(llvm::Constant::getNullValue(Type::getInt32Ty(VMContext))):
957 Elts.push_back(DV->getOperand(i));
958 return DIVariable(MDNode::get(VMContext, Elts));
961 //===----------------------------------------------------------------------===//
962 // DebugInfoFinder implementations.
963 //===----------------------------------------------------------------------===//
965 /// processModule - Process entire module and collect debug info.
966 void DebugInfoFinder::processModule(Module &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 if (CU.getVersion() > LLVMDebugVersion10) {
972 DIArray GVs = CU.getGlobalVariables();
973 for (unsigned i = 0, e = GVs.getNumElements(); i != e; ++i) {
974 DIGlobalVariable DIG(GVs.getElement(i));
975 if (addGlobalVariable(DIG))
976 processType(DIG.getType());
978 DIArray SPs = CU.getSubprograms();
979 for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i)
980 processSubprogram(DISubprogram(SPs.getElement(i)));
981 DIArray EnumTypes = CU.getEnumTypes();
982 for (unsigned i = 0, e = EnumTypes.getNumElements(); i != e; ++i)
983 processType(DIType(EnumTypes.getElement(i)));
984 DIArray RetainedTypes = CU.getRetainedTypes();
985 for (unsigned i = 0, e = RetainedTypes.getNumElements(); i != e; ++i)
986 processType(DIType(RetainedTypes.getElement(i)));
992 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
993 for (Function::iterator FI = (*I).begin(), FE = (*I).end(); FI != FE; ++FI)
994 for (BasicBlock::iterator BI = (*FI).begin(), BE = (*FI).end(); BI != BE;
996 if (DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(BI))
999 DebugLoc Loc = BI->getDebugLoc();
1000 if (Loc.isUnknown())
1003 LLVMContext &Ctx = BI->getContext();
1004 DIDescriptor Scope(Loc.getScope(Ctx));
1006 if (Scope.isCompileUnit())
1007 addCompileUnit(DICompileUnit(Scope));
1008 else if (Scope.isSubprogram())
1009 processSubprogram(DISubprogram(Scope));
1010 else if (Scope.isLexicalBlockFile()) {
1011 DILexicalBlockFile DBF = DILexicalBlockFile(Scope);
1012 processLexicalBlock(DILexicalBlock(DBF.getScope()));
1014 else if (Scope.isLexicalBlock())
1015 processLexicalBlock(DILexicalBlock(Scope));
1017 if (MDNode *IA = Loc.getInlinedAt(Ctx))
1018 processLocation(DILocation(IA));
1021 if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.gv")) {
1022 for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
1023 DIGlobalVariable DIG(cast<MDNode>(NMD->getOperand(i)));
1024 if (addGlobalVariable(DIG)) {
1025 if (DIG.getVersion() <= LLVMDebugVersion10)
1026 addCompileUnit(DIG.getCompileUnit());
1027 processType(DIG.getType());
1032 if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.sp"))
1033 for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i)
1034 processSubprogram(DISubprogram(NMD->getOperand(i)));
1037 /// processLocation - Process DILocation.
1038 void DebugInfoFinder::processLocation(DILocation Loc) {
1039 if (!Loc.Verify()) return;
1040 DIDescriptor S(Loc.getScope());
1041 if (S.isCompileUnit())
1042 addCompileUnit(DICompileUnit(S));
1043 else if (S.isSubprogram())
1044 processSubprogram(DISubprogram(S));
1045 else if (S.isLexicalBlock())
1046 processLexicalBlock(DILexicalBlock(S));
1047 else if (S.isLexicalBlockFile()) {
1048 DILexicalBlockFile DBF = DILexicalBlockFile(S);
1049 processLexicalBlock(DILexicalBlock(DBF.getScope()));
1051 processLocation(Loc.getOrigLocation());
1054 /// processType - Process DIType.
1055 void DebugInfoFinder::processType(DIType DT) {
1058 if (DT.getVersion() <= LLVMDebugVersion10)
1059 addCompileUnit(DT.getCompileUnit());
1060 if (DT.isCompositeType()) {
1061 DICompositeType DCT(DT);
1062 processType(DCT.getTypeDerivedFrom());
1063 DIArray DA = DCT.getTypeArray();
1064 for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
1065 DIDescriptor D = DA.getElement(i);
1067 processType(DIType(D));
1068 else if (D.isSubprogram())
1069 processSubprogram(DISubprogram(D));
1071 } else if (DT.isDerivedType()) {
1072 DIDerivedType DDT(DT);
1073 processType(DDT.getTypeDerivedFrom());
1077 /// processLexicalBlock
1078 void DebugInfoFinder::processLexicalBlock(DILexicalBlock LB) {
1079 DIScope Context = LB.getContext();
1080 if (Context.isLexicalBlock())
1081 return processLexicalBlock(DILexicalBlock(Context));
1082 else if (Context.isLexicalBlockFile()) {
1083 DILexicalBlockFile DBF = DILexicalBlockFile(Context);
1084 return processLexicalBlock(DILexicalBlock(DBF.getScope()));
1087 return processSubprogram(DISubprogram(Context));
1090 /// processSubprogram - Process DISubprogram.
1091 void DebugInfoFinder::processSubprogram(DISubprogram SP) {
1092 if (!addSubprogram(SP))
1094 if (SP.getVersion() <= LLVMDebugVersion10)
1095 addCompileUnit(SP.getCompileUnit());
1096 processType(SP.getType());
1099 /// processDeclare - Process DbgDeclareInst.
1100 void DebugInfoFinder::processDeclare(DbgDeclareInst *DDI) {
1101 MDNode *N = dyn_cast<MDNode>(DDI->getVariable());
1105 if (!DV.isVariable())
1108 if (!NodesSeen.insert(DV))
1110 if (DIVariable(N).getVersion() <= LLVMDebugVersion10)
1111 addCompileUnit(DIVariable(N).getCompileUnit());
1112 processType(DIVariable(N).getType());
1115 /// addType - Add type into Tys.
1116 bool DebugInfoFinder::addType(DIType DT) {
1120 if (!NodesSeen.insert(DT))
1127 /// addCompileUnit - Add compile unit into CUs.
1128 bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
1132 if (!NodesSeen.insert(CU))
1139 /// addGlobalVariable - Add global variable into GVs.
1140 bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
1141 if (!DIDescriptor(DIG).isGlobalVariable())
1144 if (!NodesSeen.insert(DIG))
1151 // addSubprogram - Add subprgoram into SPs.
1152 bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
1153 if (!DIDescriptor(SP).isSubprogram())
1156 if (!NodesSeen.insert(SP))
1163 /// getDISubprogram - Find subprogram that is enclosing this scope.
1164 DISubprogram llvm::getDISubprogram(const MDNode *Scope) {
1165 DIDescriptor D(Scope);
1166 if (D.isSubprogram())
1167 return DISubprogram(Scope);
1169 if (D.isLexicalBlockFile())
1170 return getDISubprogram(DILexicalBlockFile(Scope).getContext());
1172 if (D.isLexicalBlock())
1173 return getDISubprogram(DILexicalBlock(Scope).getContext());
1175 return DISubprogram();
1178 /// getDICompositeType - Find underlying composite type.
1179 DICompositeType llvm::getDICompositeType(DIType T) {
1180 if (T.isCompositeType())
1181 return DICompositeType(T);
1183 if (T.isDerivedType())
1184 return getDICompositeType(DIDerivedType(T).getTypeDerivedFrom());
1186 return DICompositeType();
1189 /// isSubprogramContext - Return true if Context is either a subprogram
1190 /// or another context nested inside a subprogram.
1191 bool llvm::isSubprogramContext(const MDNode *Context) {
1194 DIDescriptor D(Context);
1195 if (D.isSubprogram())
1198 return isSubprogramContext(DIType(Context).getContext());