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 //===----------------------------------------------------------------------===//
293 // Simple Descriptor Constructors and other Methods
294 //===----------------------------------------------------------------------===//
296 DIType::DIType(const MDNode *N) : DIScope(N) {
298 if (!isBasicType() && !isDerivedType() && !isCompositeType()) {
303 unsigned DIArray::getNumElements() const {
306 return DbgNode->getNumOperands();
309 /// replaceAllUsesWith - Replace all uses of debug info referenced by
311 void DIType::replaceAllUsesWith(DIDescriptor &D) {
315 // Since we use a TrackingVH for the node, its easy for clients to manufacture
316 // legitimate situations where they want to replaceAllUsesWith() on something
317 // which, due to uniquing, has merged with the source. We shield clients from
318 // this detail by allowing a value to be replaced with replaceAllUsesWith()
321 MDNode *Node = const_cast<MDNode*>(DbgNode);
322 const MDNode *DN = D;
323 const Value *V = cast_or_null<Value>(DN);
324 Node->replaceAllUsesWith(const_cast<Value*>(V));
325 MDNode::deleteTemporary(Node);
329 /// replaceAllUsesWith - Replace all uses of debug info referenced by
331 void DIType::replaceAllUsesWith(MDNode *D) {
335 // Since we use a TrackingVH for the node, its easy for clients to manufacture
336 // legitimate situations where they want to replaceAllUsesWith() on something
337 // which, due to uniquing, has merged with the source. We shield clients from
338 // this detail by allowing a value to be replaced with replaceAllUsesWith()
341 MDNode *Node = const_cast<MDNode*>(DbgNode);
342 const MDNode *DN = D;
343 const Value *V = cast_or_null<Value>(DN);
344 Node->replaceAllUsesWith(const_cast<Value*>(V));
345 MDNode::deleteTemporary(Node);
349 /// isUnsignedDIType - Return true if type encoding is unsigned.
350 bool DIType::isUnsignedDIType() {
351 DIDerivedType DTy(DbgNode);
353 return DTy.getTypeDerivedFrom().isUnsignedDIType();
355 DIBasicType BTy(DbgNode);
357 unsigned Encoding = BTy.getEncoding();
358 if (Encoding == dwarf::DW_ATE_unsigned ||
359 Encoding == dwarf::DW_ATE_unsigned_char)
365 /// Verify - Verify that a compile unit is well formed.
366 bool DICompileUnit::Verify() const {
369 StringRef N = getFilename();
372 // It is possible that directory and produce string is empty.
376 /// Verify - Verify that a type descriptor is well formed.
377 bool DIType::Verify() const {
380 if (getContext() && !getContext().Verify())
382 unsigned Tag = getTag();
383 if (!isBasicType() && Tag != dwarf::DW_TAG_const_type &&
384 Tag != dwarf::DW_TAG_volatile_type && Tag != dwarf::DW_TAG_pointer_type &&
385 Tag != dwarf::DW_TAG_reference_type && Tag != dwarf::DW_TAG_restrict_type
386 && Tag != dwarf::DW_TAG_vector_type && Tag != dwarf::DW_TAG_array_type
387 && Tag != dwarf::DW_TAG_enumeration_type
388 && Tag != dwarf::DW_TAG_subroutine_type
389 && getFilename().empty())
394 /// Verify - Verify that a basic type descriptor is well formed.
395 bool DIBasicType::Verify() const {
396 return isBasicType();
399 /// Verify - Verify that a derived type descriptor is well formed.
400 bool DIDerivedType::Verify() const {
401 return isDerivedType();
404 /// Verify - Verify that a composite type descriptor is well formed.
405 bool DICompositeType::Verify() const {
408 if (getContext() && !getContext().Verify())
414 /// Verify - Verify that a subprogram descriptor is well formed.
415 bool DISubprogram::Verify() const {
419 if (getContext() && !getContext().Verify())
422 DICompositeType Ty = getType();
428 /// Verify - Verify that a global variable descriptor is well formed.
429 bool DIGlobalVariable::Verify() const {
433 if (getDisplayName().empty())
436 if (getContext() && !getContext().Verify())
439 DIType Ty = getType();
443 if (!getGlobal() && !getConstant())
449 /// Verify - Verify that a variable descriptor is well formed.
450 bool DIVariable::Verify() const {
454 if (getContext() && !getContext().Verify())
457 DIType Ty = getType();
464 /// Verify - Verify that a location descriptor is well formed.
465 bool DILocation::Verify() const {
469 return DbgNode->getNumOperands() == 4;
472 /// Verify - Verify that a namespace descriptor is well formed.
473 bool DINameSpace::Verify() const {
476 if (getName().empty())
481 /// getOriginalTypeSize - If this type is derived from a base type then
482 /// return base type size.
483 uint64_t DIDerivedType::getOriginalTypeSize() const {
484 unsigned Tag = getTag();
486 if (Tag == dwarf::DW_TAG_member || Tag == dwarf::DW_TAG_typedef ||
487 Tag == dwarf::DW_TAG_const_type || Tag == dwarf::DW_TAG_volatile_type ||
488 Tag == dwarf::DW_TAG_restrict_type) {
489 DIType BaseType = getTypeDerivedFrom();
490 // If this type is not derived from any type then take conservative
492 if (!BaseType.isValid())
493 return getSizeInBits();
494 // If this is a derived type, go ahead and get the base type, unless
495 // it's a reference or pointer type, then it's just the size of the field.
496 if (BaseType.getTag() == dwarf::DW_TAG_reference_type ||
497 BaseType.getTag() == dwarf::DW_TAG_pointer_type)
498 return getSizeInBits();
499 else if (BaseType.isDerivedType())
500 return DIDerivedType(BaseType).getOriginalTypeSize();
502 return BaseType.getSizeInBits();
505 return getSizeInBits();
508 /// isInlinedFnArgument - Return true if this variable provides debugging
509 /// information for an inlined function arguments.
510 bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
511 assert(CurFn && "Invalid function");
512 if (!getContext().isSubprogram())
514 // This variable is not inlined function argument if its scope
515 // does not describe current function.
516 return !(DISubprogram(getContext()).describes(CurFn));
519 /// describes - Return true if this subprogram provides debugging
520 /// information for the function F.
521 bool DISubprogram::describes(const Function *F) {
522 assert(F && "Invalid function");
523 if (F == getFunction())
525 StringRef Name = getLinkageName();
528 if (F->getName() == Name)
533 unsigned DISubprogram::isOptimized() const {
534 assert (DbgNode && "Invalid subprogram descriptor!");
535 if (DbgNode->getNumOperands() == 16)
536 return getUnsignedField(15);
540 MDNode *DISubprogram::getVariablesNodes() const {
541 if (!DbgNode || DbgNode->getNumOperands() <= 19)
543 if (MDNode *Temp = dyn_cast_or_null<MDNode>(DbgNode->getOperand(19)))
544 return dyn_cast_or_null<MDNode>(Temp->getOperand(0));
548 DIArray DISubprogram::getVariables() const {
549 if (!DbgNode || DbgNode->getNumOperands() <= 19)
551 if (MDNode *T = dyn_cast_or_null<MDNode>(DbgNode->getOperand(19)))
552 if (MDNode *A = dyn_cast_or_null<MDNode>(T->getOperand(0)))
557 StringRef DIScope::getFilename() const {
560 if (isLexicalBlockFile())
561 return DILexicalBlockFile(DbgNode).getFilename();
562 if (isLexicalBlock())
563 return DILexicalBlock(DbgNode).getFilename();
565 return DISubprogram(DbgNode).getFilename();
567 return DICompileUnit(DbgNode).getFilename();
569 return DINameSpace(DbgNode).getFilename();
571 return DIType(DbgNode).getFilename();
573 return DIFile(DbgNode).getFilename();
574 assert(0 && "Invalid DIScope!");
578 StringRef DIScope::getDirectory() const {
581 if (isLexicalBlockFile())
582 return DILexicalBlockFile(DbgNode).getDirectory();
583 if (isLexicalBlock())
584 return DILexicalBlock(DbgNode).getDirectory();
586 return DISubprogram(DbgNode).getDirectory();
588 return DICompileUnit(DbgNode).getDirectory();
590 return DINameSpace(DbgNode).getDirectory();
592 return DIType(DbgNode).getDirectory();
594 return DIFile(DbgNode).getDirectory();
595 assert(0 && "Invalid DIScope!");
599 DIArray DICompileUnit::getEnumTypes() const {
600 if (!DbgNode || DbgNode->getNumOperands() < 14)
603 if (MDNode *N = dyn_cast_or_null<MDNode>(DbgNode->getOperand(10)))
604 if (MDNode *A = dyn_cast_or_null<MDNode>(N->getOperand(0)))
609 DIArray DICompileUnit::getRetainedTypes() const {
610 if (!DbgNode || DbgNode->getNumOperands() < 14)
613 if (MDNode *N = dyn_cast_or_null<MDNode>(DbgNode->getOperand(11)))
614 if (MDNode *A = dyn_cast_or_null<MDNode>(N->getOperand(0)))
619 DIArray DICompileUnit::getSubprograms() const {
620 if (!DbgNode || DbgNode->getNumOperands() < 14)
623 if (MDNode *N = dyn_cast_or_null<MDNode>(DbgNode->getOperand(12)))
624 if (MDNode *A = dyn_cast_or_null<MDNode>(N->getOperand(0)))
630 DIArray DICompileUnit::getGlobalVariables() const {
631 if (!DbgNode || DbgNode->getNumOperands() < 14)
634 if (MDNode *N = dyn_cast_or_null<MDNode>(DbgNode->getOperand(13)))
635 if (MDNode *A = dyn_cast_or_null<MDNode>(N->getOperand(0)))
640 //===----------------------------------------------------------------------===//
641 // DIDescriptor: vtable anchors for all descriptors.
642 //===----------------------------------------------------------------------===//
644 void DIScope::anchor() { }
646 void DICompileUnit::anchor() { }
648 void DIFile::anchor() { }
650 void DIType::anchor() { }
652 void DIBasicType::anchor() { }
654 void DIDerivedType::anchor() { }
656 void DICompositeType::anchor() { }
658 void DISubprogram::anchor() { }
660 void DILexicalBlock::anchor() { }
662 void DINameSpace::anchor() { }
664 void DILexicalBlockFile::anchor() { }
666 //===----------------------------------------------------------------------===//
667 // DIDescriptor: dump routines for all descriptors.
668 //===----------------------------------------------------------------------===//
671 /// print - Print descriptor.
672 void DIDescriptor::print(raw_ostream &OS) const {
673 OS << "[" << dwarf::TagString(getTag()) << "] ";
674 OS.write_hex((intptr_t) &*DbgNode) << ']';
677 /// print - Print compile unit.
678 void DICompileUnit::print(raw_ostream &OS) const {
680 OS << " [" << dwarf::LanguageString(getLanguage()) << "] ";
682 OS << " [" << getDirectory() << "/" << getFilename() << "]";
685 /// print - Print type.
686 void DIType::print(raw_ostream &OS) const {
687 if (!DbgNode) return;
689 StringRef Res = getName();
691 OS << " [" << Res << "] ";
693 unsigned Tag = getTag();
694 OS << " [" << dwarf::TagString(Tag) << "] ";
696 // TODO : Print context
698 << "line " << getLineNumber() << ", "
699 << getSizeInBits() << " bits, "
700 << getAlignInBits() << " bit alignment, "
701 << getOffsetInBits() << " bit offset"
706 else if (isProtected())
707 OS << " [protected] ";
713 DIBasicType(DbgNode).print(OS);
714 else if (isDerivedType())
715 DIDerivedType(DbgNode).print(OS);
716 else if (isCompositeType())
717 DICompositeType(DbgNode).print(OS);
719 OS << "Invalid DIType\n";
726 /// print - Print basic type.
727 void DIBasicType::print(raw_ostream &OS) const {
728 OS << " [" << dwarf::AttributeEncodingString(getEncoding()) << "] ";
731 /// print - Print derived type.
732 void DIDerivedType::print(raw_ostream &OS) const {
733 OS << "\n\t Derived From: "; getTypeDerivedFrom().print(OS);
736 /// print - Print composite type.
737 void DICompositeType::print(raw_ostream &OS) const {
738 DIArray A = getTypeArray();
739 OS << " [" << A.getNumElements() << " elements]";
742 /// print - Print subprogram.
743 void DISubprogram::print(raw_ostream &OS) const {
744 StringRef Res = getName();
746 OS << " [" << Res << "] ";
748 unsigned Tag = getTag();
749 OS << " [" << dwarf::TagString(Tag) << "] ";
751 // TODO : Print context
752 OS << " [" << getLineNumber() << "] ";
763 /// print - Print global variable.
764 void DIGlobalVariable::print(raw_ostream &OS) const {
766 StringRef Res = getName();
768 OS << " [" << Res << "] ";
770 unsigned Tag = getTag();
771 OS << " [" << dwarf::TagString(Tag) << "] ";
773 // TODO : Print context
774 OS << " [" << getLineNumber() << "] ";
782 if (isGlobalVariable())
783 DIGlobalVariable(DbgNode).print(OS);
787 static void printDebugLoc(DebugLoc DL, raw_ostream &CommentOS,
788 const LLVMContext &Ctx) {
789 if (!DL.isUnknown()) { // Print source line info.
790 DIScope Scope(DL.getScope(Ctx));
791 // Omit the directory, because it's likely to be long and uninteresting.
793 CommentOS << Scope.getFilename();
795 CommentOS << "<unknown>";
796 CommentOS << ':' << DL.getLine();
797 if (DL.getCol() != 0)
798 CommentOS << ':' << DL.getCol();
799 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(DL.getInlinedAt(Ctx));
800 if (!InlinedAtDL.isUnknown()) {
802 printDebugLoc(InlinedAtDL, CommentOS, Ctx);
808 void DIVariable::printExtendedName(raw_ostream &OS) const {
809 const LLVMContext &Ctx = DbgNode->getContext();
810 StringRef Res = getName();
812 OS << Res << "," << getLineNumber();
813 if (MDNode *InlinedAt = getInlinedAt()) {
814 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(InlinedAt);
815 if (!InlinedAtDL.isUnknown()) {
817 printDebugLoc(InlinedAtDL, OS, Ctx);
823 /// print - Print variable.
824 void DIVariable::print(raw_ostream &OS) const {
825 StringRef Res = getName();
827 OS << " [" << Res << "] ";
829 OS << " [" << getLineNumber() << "] ";
833 // FIXME: Dump complex addresses
836 /// dump - Print descriptor to dbgs() with a newline.
837 void DIDescriptor::dump() const {
838 print(dbgs()); dbgs() << '\n';
841 /// dump - Print compile unit to dbgs() with a newline.
842 void DICompileUnit::dump() const {
843 print(dbgs()); dbgs() << '\n';
846 /// dump - Print type to dbgs() with a newline.
847 void DIType::dump() const {
848 print(dbgs()); dbgs() << '\n';
851 /// dump - Print basic type to dbgs() with a newline.
852 void DIBasicType::dump() const {
853 print(dbgs()); dbgs() << '\n';
856 /// dump - Print derived type to dbgs() with a newline.
857 void DIDerivedType::dump() const {
858 print(dbgs()); dbgs() << '\n';
861 /// dump - Print composite type to dbgs() with a newline.
862 void DICompositeType::dump() const {
863 print(dbgs()); dbgs() << '\n';
866 /// dump - Print subprogram to dbgs() with a newline.
867 void DISubprogram::dump() const {
868 print(dbgs()); dbgs() << '\n';
871 /// dump - Print global variable.
872 void DIGlobalVariable::dump() const {
873 print(dbgs()); dbgs() << '\n';
876 /// dump - Print variable.
877 void DIVariable::dump() const {
878 print(dbgs()); dbgs() << '\n';
881 /// fixupObjcLikeName - Replace contains special characters used
882 /// in a typical Objective-C names with '.' in a given string.
883 static void fixupObjcLikeName(StringRef Str, SmallVectorImpl<char> &Out) {
884 bool isObjCLike = false;
885 for (size_t i = 0, e = Str.size(); i < e; ++i) {
890 if (isObjCLike && (C == '[' || C == ']' || C == ' ' || C == ':' ||
891 C == '+' || C == '(' || C == ')'))
898 /// getFnSpecificMDNode - Return a NameMDNode, if available, that is
899 /// suitable to hold function specific information.
900 NamedMDNode *llvm::getFnSpecificMDNode(const Module &M, DISubprogram Fn) {
901 SmallString<32> Name = StringRef("llvm.dbg.lv.");
902 StringRef FName = "fn";
903 if (Fn.getFunction())
904 FName = Fn.getFunction()->getName();
906 FName = Fn.getName();
908 if (FName.startswith(StringRef(&One, 1)))
909 FName = FName.substr(1);
910 fixupObjcLikeName(FName, Name);
911 return M.getNamedMetadata(Name.str());
914 /// getOrInsertFnSpecificMDNode - Return a NameMDNode that is suitable
915 /// to hold function specific information.
916 NamedMDNode *llvm::getOrInsertFnSpecificMDNode(Module &M, DISubprogram Fn) {
917 SmallString<32> Name = StringRef("llvm.dbg.lv.");
918 StringRef FName = "fn";
919 if (Fn.getFunction())
920 FName = Fn.getFunction()->getName();
922 FName = Fn.getName();
924 if (FName.startswith(StringRef(&One, 1)))
925 FName = FName.substr(1);
926 fixupObjcLikeName(FName, Name);
928 return M.getOrInsertNamedMetadata(Name.str());
931 /// createInlinedVariable - Create a new inlined variable based on current
933 /// @param DV Current Variable.
934 /// @param InlinedScope Location at current variable is inlined.
935 DIVariable llvm::createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
936 LLVMContext &VMContext) {
937 SmallVector<Value *, 16> Elts;
938 // Insert inlined scope as 7th element.
939 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
940 i == 7 ? Elts.push_back(InlinedScope) :
941 Elts.push_back(DV->getOperand(i));
942 return DIVariable(MDNode::get(VMContext, Elts));
945 /// cleanseInlinedVariable - Remove inlined scope from the variable.
946 DIVariable llvm::cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext) {
947 SmallVector<Value *, 16> Elts;
948 // Insert inlined scope as 7th element.
949 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
951 Elts.push_back(llvm::Constant::getNullValue(Type::getInt32Ty(VMContext))):
952 Elts.push_back(DV->getOperand(i));
953 return DIVariable(MDNode::get(VMContext, Elts));
956 //===----------------------------------------------------------------------===//
957 // DebugInfoFinder implementations.
958 //===----------------------------------------------------------------------===//
960 /// processModule - Process entire module and collect debug info.
961 void DebugInfoFinder::processModule(Module &M) {
962 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
963 for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
964 DICompileUnit CU(CU_Nodes->getOperand(i));
966 if (CU.getVersion() > LLVMDebugVersion10) {
967 DIArray GVs = CU.getGlobalVariables();
968 for (unsigned i = 0, e = GVs.getNumElements(); i != e; ++i) {
969 DIGlobalVariable DIG(GVs.getElement(i));
970 if (addGlobalVariable(DIG))
971 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)));
987 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
988 for (Function::iterator FI = (*I).begin(), FE = (*I).end(); FI != FE; ++FI)
989 for (BasicBlock::iterator BI = (*FI).begin(), BE = (*FI).end(); BI != BE;
991 if (DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(BI))
994 DebugLoc Loc = BI->getDebugLoc();
998 LLVMContext &Ctx = BI->getContext();
999 DIDescriptor Scope(Loc.getScope(Ctx));
1001 if (Scope.isCompileUnit())
1002 addCompileUnit(DICompileUnit(Scope));
1003 else if (Scope.isSubprogram())
1004 processSubprogram(DISubprogram(Scope));
1005 else if (Scope.isLexicalBlockFile()) {
1006 DILexicalBlockFile DBF = DILexicalBlockFile(Scope);
1007 processLexicalBlock(DILexicalBlock(DBF.getScope()));
1009 else if (Scope.isLexicalBlock())
1010 processLexicalBlock(DILexicalBlock(Scope));
1012 if (MDNode *IA = Loc.getInlinedAt(Ctx))
1013 processLocation(DILocation(IA));
1016 if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.gv")) {
1017 for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
1018 DIGlobalVariable DIG(cast<MDNode>(NMD->getOperand(i)));
1019 if (addGlobalVariable(DIG)) {
1020 if (DIG.getVersion() <= LLVMDebugVersion10)
1021 addCompileUnit(DIG.getCompileUnit());
1022 processType(DIG.getType());
1027 if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.sp"))
1028 for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i)
1029 processSubprogram(DISubprogram(NMD->getOperand(i)));
1032 /// processLocation - Process DILocation.
1033 void DebugInfoFinder::processLocation(DILocation Loc) {
1034 if (!Loc.Verify()) return;
1035 DIDescriptor S(Loc.getScope());
1036 if (S.isCompileUnit())
1037 addCompileUnit(DICompileUnit(S));
1038 else if (S.isSubprogram())
1039 processSubprogram(DISubprogram(S));
1040 else if (S.isLexicalBlock())
1041 processLexicalBlock(DILexicalBlock(S));
1042 else if (S.isLexicalBlockFile()) {
1043 DILexicalBlockFile DBF = DILexicalBlockFile(S);
1044 processLexicalBlock(DILexicalBlock(DBF.getScope()));
1046 processLocation(Loc.getOrigLocation());
1049 /// processType - Process DIType.
1050 void DebugInfoFinder::processType(DIType DT) {
1053 if (DT.getVersion() <= LLVMDebugVersion10)
1054 addCompileUnit(DT.getCompileUnit());
1055 if (DT.isCompositeType()) {
1056 DICompositeType DCT(DT);
1057 processType(DCT.getTypeDerivedFrom());
1058 DIArray DA = DCT.getTypeArray();
1059 for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
1060 DIDescriptor D = DA.getElement(i);
1062 processType(DIType(D));
1063 else if (D.isSubprogram())
1064 processSubprogram(DISubprogram(D));
1066 } else if (DT.isDerivedType()) {
1067 DIDerivedType DDT(DT);
1068 processType(DDT.getTypeDerivedFrom());
1072 /// processLexicalBlock
1073 void DebugInfoFinder::processLexicalBlock(DILexicalBlock LB) {
1074 DIScope Context = LB.getContext();
1075 if (Context.isLexicalBlock())
1076 return processLexicalBlock(DILexicalBlock(Context));
1077 else if (Context.isLexicalBlockFile()) {
1078 DILexicalBlockFile DBF = DILexicalBlockFile(Context);
1079 return processLexicalBlock(DILexicalBlock(DBF.getScope()));
1082 return processSubprogram(DISubprogram(Context));
1085 /// processSubprogram - Process DISubprogram.
1086 void DebugInfoFinder::processSubprogram(DISubprogram SP) {
1087 if (!addSubprogram(SP))
1089 if (SP.getVersion() <= LLVMDebugVersion10)
1090 addCompileUnit(SP.getCompileUnit());
1091 processType(SP.getType());
1094 /// processDeclare - Process DbgDeclareInst.
1095 void DebugInfoFinder::processDeclare(DbgDeclareInst *DDI) {
1096 MDNode *N = dyn_cast<MDNode>(DDI->getVariable());
1100 if (!DV.isVariable())
1103 if (!NodesSeen.insert(DV))
1105 if (DIVariable(N).getVersion() <= LLVMDebugVersion10)
1106 addCompileUnit(DIVariable(N).getCompileUnit());
1107 processType(DIVariable(N).getType());
1110 /// addType - Add type into Tys.
1111 bool DebugInfoFinder::addType(DIType DT) {
1115 if (!NodesSeen.insert(DT))
1122 /// addCompileUnit - Add compile unit into CUs.
1123 bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
1127 if (!NodesSeen.insert(CU))
1134 /// addGlobalVariable - Add global variable into GVs.
1135 bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
1136 if (!DIDescriptor(DIG).isGlobalVariable())
1139 if (!NodesSeen.insert(DIG))
1146 // addSubprogram - Add subprgoram into SPs.
1147 bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
1148 if (!DIDescriptor(SP).isSubprogram())
1151 if (!NodesSeen.insert(SP))
1158 /// getDISubprogram - Find subprogram that is enclosing this scope.
1159 DISubprogram llvm::getDISubprogram(const MDNode *Scope) {
1160 DIDescriptor D(Scope);
1161 if (D.isSubprogram())
1162 return DISubprogram(Scope);
1164 if (D.isLexicalBlockFile())
1165 return getDISubprogram(DILexicalBlockFile(Scope).getContext());
1167 if (D.isLexicalBlock())
1168 return getDISubprogram(DILexicalBlock(Scope).getContext());
1170 return DISubprogram();
1173 /// getDICompositeType - Find underlying composite type.
1174 DICompositeType llvm::getDICompositeType(DIType T) {
1175 if (T.isCompositeType())
1176 return DICompositeType(T);
1178 if (T.isDerivedType())
1179 return getDICompositeType(DIDerivedType(T).getTypeDerivedFrom());
1181 return DICompositeType();
1184 /// isSubprogramContext - Return true if Context is either a subprogram
1185 /// or another context nested inside a subprogram.
1186 bool llvm::isSubprogramContext(const MDNode *Context) {
1189 DIDescriptor D(Context);
1190 if (D.isSubprogram())
1193 return isSubprogramContext(DIType(Context).getContext());