1 //===--- DebugInfo.cpp - Debug Information Helper Classes -----------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements the helper classes used to build and interpret debug
11 // information in LLVM IR form.
12 //
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"
30 using namespace llvm;
31 using namespace llvm::dwarf;
33 //===----------------------------------------------------------------------===//
34 // DIDescriptor
35 //===----------------------------------------------------------------------===//
37 DIDescriptor::DIDescriptor(const DIFile F) : DbgNode(F.DbgNode) {
38 }
40 DIDescriptor::DIDescriptor(const DISubprogram F) : DbgNode(F.DbgNode) {
41 }
43 DIDescriptor::DIDescriptor(const DILexicalBlockFile F) : DbgNode(F.DbgNode) {
44 }
46 DIDescriptor::DIDescriptor(const DILexicalBlock F) : DbgNode(F.DbgNode) {
47 }
49 DIDescriptor::DIDescriptor(const DIVariable F) : DbgNode(F.DbgNode) {
50 }
52 DIDescriptor::DIDescriptor(const DIType F) : DbgNode(F.DbgNode) {
53 }
55 bool DIDescriptor::Verify() const {
56 return DbgNode &&
57 (DIDerivedType(DbgNode).Verify() ||
58 DICompositeType(DbgNode).Verify() || DIBasicType(DbgNode).Verify() ||
59 DIVariable(DbgNode).Verify() || DISubprogram(DbgNode).Verify() ||
60 DIGlobalVariable(DbgNode).Verify() || DIFile(DbgNode).Verify() ||
61 DICompileUnit(DbgNode).Verify() || DINameSpace(DbgNode).Verify() ||
62 DILexicalBlock(DbgNode).Verify() ||
63 DILexicalBlockFile(DbgNode).Verify() ||
64 DISubrange(DbgNode).Verify() || DIEnumerator(DbgNode).Verify() ||
65 DIObjCProperty(DbgNode).Verify() ||
66 DITemplateTypeParameter(DbgNode).Verify() ||
67 DITemplateValueParameter(DbgNode).Verify() ||
68 DIImportedModule(DbgNode).Verify());
69 }
71 static Value *getField(const MDNode *DbgNode, unsigned Elt) {
72 if (DbgNode == 0 || Elt >= DbgNode->getNumOperands())
73 return 0;
74 return DbgNode->getOperand(Elt);
75 }
77 static const MDNode *getNodeField(const MDNode *DbgNode, unsigned Elt) {
78 if (const MDNode *R = dyn_cast_or_null<MDNode>(getField(DbgNode, Elt)))
79 return R;
80 return 0;
81 }
83 static StringRef getStringField(const MDNode *DbgNode, unsigned Elt) {
84 if (MDString *MDS = dyn_cast_or_null<MDString>(getField(DbgNode, Elt)))
85 return MDS->getString();
86 return StringRef();
87 }
89 StringRef DIDescriptor::getStringField(unsigned Elt) const {
90 return ::getStringField(DbgNode, Elt);
91 }
93 uint64_t DIDescriptor::getUInt64Field(unsigned Elt) const {
94 if (DbgNode == 0)
95 return 0;
97 if (Elt < DbgNode->getNumOperands())
98 if (ConstantInt *CI
99 = dyn_cast_or_null<ConstantInt>(DbgNode->getOperand(Elt)))
100 return CI->getZExtValue();
102 return 0;
103 }
105 int64_t DIDescriptor::getInt64Field(unsigned Elt) const {
106 if (DbgNode == 0)
107 return 0;
109 if (Elt < DbgNode->getNumOperands())
110 if (ConstantInt *CI
111 = dyn_cast_or_null<ConstantInt>(DbgNode->getOperand(Elt)))
112 return CI->getSExtValue();
114 return 0;
115 }
117 DIDescriptor DIDescriptor::getDescriptorField(unsigned Elt) const {
118 if (DbgNode == 0)
119 return DIDescriptor();
121 if (Elt < DbgNode->getNumOperands())
122 return
123 DIDescriptor(dyn_cast_or_null<const MDNode>(DbgNode->getOperand(Elt)));
124 return DIDescriptor();
125 }
127 GlobalVariable *DIDescriptor::getGlobalVariableField(unsigned Elt) const {
128 if (DbgNode == 0)
129 return 0;
131 if (Elt < DbgNode->getNumOperands())
132 return dyn_cast_or_null<GlobalVariable>(DbgNode->getOperand(Elt));
133 return 0;
134 }
136 Constant *DIDescriptor::getConstantField(unsigned Elt) const {
137 if (DbgNode == 0)
138 return 0;
140 if (Elt < DbgNode->getNumOperands())
141 return dyn_cast_or_null<Constant>(DbgNode->getOperand(Elt));
142 return 0;
143 }
145 Function *DIDescriptor::getFunctionField(unsigned Elt) const {
146 if (DbgNode == 0)
147 return 0;
149 if (Elt < DbgNode->getNumOperands())
150 return dyn_cast_or_null<Function>(DbgNode->getOperand(Elt));
151 return 0;
152 }
154 void DIDescriptor::replaceFunctionField(unsigned Elt, Function *F) {
155 if (DbgNode == 0)
156 return;
158 if (Elt < DbgNode->getNumOperands()) {
159 MDNode *Node = const_cast<MDNode*>(DbgNode);
160 Node->replaceOperandWith(Elt, F);
161 }
162 }
164 unsigned DIVariable::getNumAddrElements() const {
165 return DbgNode->getNumOperands()-8;
166 }
168 /// getInlinedAt - If this variable is inlined then return inline location.
169 MDNode *DIVariable::getInlinedAt() const {
170 return dyn_cast_or_null<MDNode>(DbgNode->getOperand(7));
171 }
173 //===----------------------------------------------------------------------===//
174 // Predicates
175 //===----------------------------------------------------------------------===//
177 /// isBasicType - Return true if the specified tag is legal for
178 /// DIBasicType.
179 bool DIDescriptor::isBasicType() const {
180 if (!DbgNode) return false;
181 switch (getTag()) {
182 case dwarf::DW_TAG_base_type:
183 case dwarf::DW_TAG_unspecified_type:
184 return true;
185 default:
186 return false;
187 }
188 }
190 /// isDerivedType - Return true if the specified tag is legal for DIDerivedType.
191 bool DIDescriptor::isDerivedType() const {
192 if (!DbgNode) return false;
193 switch (getTag()) {
194 case dwarf::DW_TAG_typedef:
195 case dwarf::DW_TAG_pointer_type:
196 case dwarf::DW_TAG_ptr_to_member_type:
197 case dwarf::DW_TAG_reference_type:
198 case dwarf::DW_TAG_rvalue_reference_type:
199 case dwarf::DW_TAG_const_type:
200 case dwarf::DW_TAG_volatile_type:
201 case dwarf::DW_TAG_restrict_type:
202 case dwarf::DW_TAG_member:
203 case dwarf::DW_TAG_inheritance:
204 case dwarf::DW_TAG_friend:
205 return true;
206 default:
207 // CompositeTypes are currently modelled as DerivedTypes.
208 return isCompositeType();
209 }
210 }
212 /// isCompositeType - Return true if the specified tag is legal for
213 /// DICompositeType.
214 bool DIDescriptor::isCompositeType() const {
215 if (!DbgNode) return false;
216 switch (getTag()) {
217 case dwarf::DW_TAG_array_type:
218 case dwarf::DW_TAG_structure_type:
219 case dwarf::DW_TAG_union_type:
220 case dwarf::DW_TAG_enumeration_type:
221 case dwarf::DW_TAG_subroutine_type:
222 case dwarf::DW_TAG_class_type:
223 return true;
224 default:
225 return false;
226 }
227 }
229 /// isVariable - Return true if the specified tag is legal for DIVariable.
230 bool DIDescriptor::isVariable() const {
231 if (!DbgNode) return false;
232 switch (getTag()) {
233 case dwarf::DW_TAG_auto_variable:
234 case dwarf::DW_TAG_arg_variable:
235 return true;
236 default:
237 return false;
238 }
239 }
241 /// isType - Return true if the specified tag is legal for DIType.
242 bool DIDescriptor::isType() const {
243 return isBasicType() || isCompositeType() || isDerivedType();
244 }
246 /// isSubprogram - Return true if the specified tag is legal for
247 /// DISubprogram.
248 bool DIDescriptor::isSubprogram() const {
249 return DbgNode && getTag() == dwarf::DW_TAG_subprogram;
250 }
252 /// isGlobalVariable - Return true if the specified tag is legal for
253 /// DIGlobalVariable.
254 bool DIDescriptor::isGlobalVariable() const {
255 return DbgNode && (getTag() == dwarf::DW_TAG_variable ||
256 getTag() == dwarf::DW_TAG_constant);
257 }
259 /// isGlobal - Return true if the specified tag is legal for DIGlobal.
260 bool DIDescriptor::isGlobal() const {
261 return isGlobalVariable();
262 }
264 /// isUnspecifiedParmeter - Return true if the specified tag is
265 /// DW_TAG_unspecified_parameters.
266 bool DIDescriptor::isUnspecifiedParameter() const {
267 return DbgNode && getTag() == dwarf::DW_TAG_unspecified_parameters;
268 }
270 /// isScope - Return true if the specified tag is one of the scope
271 /// related tag.
272 bool DIDescriptor::isScope() const {
273 if (!DbgNode) return false;
274 switch (getTag()) {
275 case dwarf::DW_TAG_compile_unit:
276 case dwarf::DW_TAG_lexical_block:
277 case dwarf::DW_TAG_subprogram:
278 case dwarf::DW_TAG_namespace:
279 return true;
280 default:
281 break;
282 }
283 return false;
284 }
286 /// isTemplateTypeParameter - Return true if the specified tag is
287 /// DW_TAG_template_type_parameter.
288 bool DIDescriptor::isTemplateTypeParameter() const {
289 return DbgNode && getTag() == dwarf::DW_TAG_template_type_parameter;
290 }
292 /// isTemplateValueParameter - Return true if the specified tag is
293 /// DW_TAG_template_value_parameter.
294 bool DIDescriptor::isTemplateValueParameter() const {
295 return DbgNode && getTag() == dwarf::DW_TAG_template_value_parameter;
296 }
298 /// isCompileUnit - Return true if the specified tag is DW_TAG_compile_unit.
299 bool DIDescriptor::isCompileUnit() const {
300 return DbgNode && getTag() == dwarf::DW_TAG_compile_unit;
301 }
303 /// isFile - Return true if the specified tag is DW_TAG_file_type.
304 bool DIDescriptor::isFile() const {
305 return DbgNode && getTag() == dwarf::DW_TAG_file_type;
306 }
308 /// isNameSpace - Return true if the specified tag is DW_TAG_namespace.
309 bool DIDescriptor::isNameSpace() const {
310 return DbgNode && getTag() == dwarf::DW_TAG_namespace;
311 }
313 /// isLexicalBlockFile - Return true if the specified descriptor is a
314 /// lexical block with an extra file.
315 bool DIDescriptor::isLexicalBlockFile() const {
316 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
317 (DbgNode->getNumOperands() == 3);
318 }
320 /// isLexicalBlock - Return true if the specified tag is DW_TAG_lexical_block.
321 bool DIDescriptor::isLexicalBlock() const {
322 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
323 (DbgNode->getNumOperands() > 3);
324 }
326 /// isSubrange - Return true if the specified tag is DW_TAG_subrange_type.
327 bool DIDescriptor::isSubrange() const {
328 return DbgNode && getTag() == dwarf::DW_TAG_subrange_type;
329 }
331 /// isEnumerator - Return true if the specified tag is DW_TAG_enumerator.
332 bool DIDescriptor::isEnumerator() const {
333 return DbgNode && getTag() == dwarf::DW_TAG_enumerator;
334 }
336 /// isObjCProperty - Return true if the specified tag is DW_TAG_APPLE_property.
337 bool DIDescriptor::isObjCProperty() const {
338 return DbgNode && getTag() == dwarf::DW_TAG_APPLE_property;
339 }
341 /// \brief Return true if the specified tag is DW_TAG_imported_module.
342 bool DIDescriptor::isImportedModule() const {
343 return DbgNode && getTag() == dwarf::DW_TAG_imported_module;
344 }
346 //===----------------------------------------------------------------------===//
347 // Simple Descriptor Constructors and other Methods
348 //===----------------------------------------------------------------------===//
350 DIType::DIType(const MDNode *N) : DIScope(N) {
351 if (!N) return;
352 if (!isBasicType() && !isDerivedType() && !isCompositeType()) {
353 DbgNode = 0;
354 }
355 }
357 unsigned DIArray::getNumElements() const {
358 if (!DbgNode)
359 return 0;
360 return DbgNode->getNumOperands();
361 }
363 /// replaceAllUsesWith - Replace all uses of debug info referenced by
364 /// this descriptor.
365 void DIType::replaceAllUsesWith(DIDescriptor &D) {
366 if (!DbgNode)
367 return;
369 // Since we use a TrackingVH for the node, its easy for clients to manufacture
370 // legitimate situations where they want to replaceAllUsesWith() on something
371 // which, due to uniquing, has merged with the source. We shield clients from
372 // this detail by allowing a value to be replaced with replaceAllUsesWith()
373 // itself.
374 if (DbgNode != D) {
375 MDNode *Node = const_cast<MDNode*>(DbgNode);
376 const MDNode *DN = D;
377 const Value *V = cast_or_null<Value>(DN);
378 Node->replaceAllUsesWith(const_cast<Value*>(V));
379 MDNode::deleteTemporary(Node);
380 }
381 }
383 /// replaceAllUsesWith - Replace all uses of debug info referenced by
384 /// this descriptor.
385 void DIType::replaceAllUsesWith(MDNode *D) {
386 if (!DbgNode)
387 return;
389 // Since we use a TrackingVH for the node, its easy for clients to manufacture
390 // legitimate situations where they want to replaceAllUsesWith() on something
391 // which, due to uniquing, has merged with the source. We shield clients from
392 // this detail by allowing a value to be replaced with replaceAllUsesWith()
393 // itself.
394 if (DbgNode != D) {
395 MDNode *Node = const_cast<MDNode*>(DbgNode);
396 const MDNode *DN = D;
397 const Value *V = cast_or_null<Value>(DN);
398 Node->replaceAllUsesWith(const_cast<Value*>(V));
399 MDNode::deleteTemporary(Node);
400 }
401 }
403 /// isUnsignedDIType - Return true if type encoding is unsigned.
404 bool DIType::isUnsignedDIType() {
405 DIDerivedType DTy(DbgNode);
406 if (DTy.Verify())
407 return DTy.getTypeDerivedFrom().isUnsignedDIType();
409 DIBasicType BTy(DbgNode);
410 if (BTy.Verify()) {
411 unsigned Encoding = BTy.getEncoding();
412 if (Encoding == dwarf::DW_ATE_unsigned ||
413 Encoding == dwarf::DW_ATE_unsigned_char ||
414 Encoding == dwarf::DW_ATE_boolean)
415 return true;
416 }
417 return false;
418 }
420 /// Verify - Verify that a compile unit is well formed.
421 bool DICompileUnit::Verify() const {
422 if (!isCompileUnit())
423 return false;
424 StringRef N = getFilename();
425 if (N.empty())
426 return false;
427 // It is possible that directory and produce string is empty.
428 return DbgNode->getNumOperands() == 13;
429 }
431 /// Verify - Verify that an ObjC property is well formed.
432 bool DIObjCProperty::Verify() const {
433 if (!isObjCProperty())
434 return false;
436 DIType Ty = getType();
437 if (!Ty.Verify()) return false;
439 // Don't worry about the rest of the strings for now.
440 return DbgNode->getNumOperands() == 8;
441 }
443 /// Verify - Verify that a type descriptor is well formed.
444 bool DIType::Verify() const {
445 if (!isType())
446 return false;
447 if (getContext() && !getContext().Verify())
448 return false;
449 unsigned Tag = getTag();
450 if (!isBasicType() && Tag != dwarf::DW_TAG_const_type &&
451 Tag != dwarf::DW_TAG_volatile_type && Tag != dwarf::DW_TAG_pointer_type &&
452 Tag != dwarf::DW_TAG_ptr_to_member_type &&
453 Tag != dwarf::DW_TAG_reference_type &&
454 Tag != dwarf::DW_TAG_rvalue_reference_type &&
455 Tag != dwarf::DW_TAG_restrict_type &&
456 Tag != dwarf::DW_TAG_array_type &&
457 Tag != dwarf::DW_TAG_enumeration_type &&
458 Tag != dwarf::DW_TAG_subroutine_type &&
459 getFilename().empty())
460 return false;
461 return true;
462 }
464 /// Verify - Verify that a basic type descriptor is well formed.
465 bool DIBasicType::Verify() const {
466 return isBasicType() && DbgNode->getNumOperands() == 10;
467 }
469 /// Verify - Verify that a derived type descriptor is well formed.
470 bool DIDerivedType::Verify() const {
471 return isDerivedType() && DbgNode->getNumOperands() >= 10 &&
472 DbgNode->getNumOperands() <= 14;
473 }
475 /// Verify - Verify that a composite type descriptor is well formed.
476 bool DICompositeType::Verify() const {
477 if (!isCompositeType())
478 return false;
479 if (getContext() && !getContext().Verify())
480 return false;
482 return DbgNode->getNumOperands() >= 10 && DbgNode->getNumOperands() <= 14;
483 }
485 /// Verify - Verify that a subprogram descriptor is well formed.
486 bool DISubprogram::Verify() const {
487 if (!isSubprogram())
488 return false;
490 if (getContext() && !getContext().Verify())
491 return false;
493 DICompositeType Ty = getType();
494 if (!Ty.Verify())
495 return false;
496 return DbgNode->getNumOperands() == 20;
497 }
499 /// Verify - Verify that a global variable descriptor is well formed.
500 bool DIGlobalVariable::Verify() const {
501 if (!isGlobalVariable())
502 return false;
504 if (getDisplayName().empty())
505 return false;
507 if (getContext() && !getContext().Verify())
508 return false;
510 DIType Ty = getType();
511 if (!Ty.Verify())
512 return false;
514 if (!getGlobal() && !getConstant())
515 return false;
517 return DbgNode->getNumOperands() == 13;
518 }
520 /// Verify - Verify that a variable descriptor is well formed.
521 bool DIVariable::Verify() const {
522 if (!isVariable())
523 return false;
525 if (getContext() && !getContext().Verify())
526 return false;
528 DIType Ty = getType();
529 if (!Ty.Verify())
530 return false;
532 return DbgNode->getNumOperands() >= 8;
533 }
535 /// Verify - Verify that a location descriptor is well formed.
536 bool DILocation::Verify() const {
537 if (!DbgNode)
538 return false;
540 return DbgNode->getNumOperands() == 4;
541 }
543 /// Verify - Verify that a namespace descriptor is well formed.
544 bool DINameSpace::Verify() const {
545 if (!isNameSpace())
546 return false;
547 return DbgNode->getNumOperands() == 5;
548 }
550 /// \brief Retrieve the MDNode for the directory/file pair.
551 MDNode *DIFile::getFileNode() const {
552 return const_cast<MDNode*>(getNodeField(DbgNode, 1));
553 }
555 /// \brief Verify that the file descriptor is well formed.
556 bool DIFile::Verify() const {
557 return isFile() && DbgNode->getNumOperands() == 2;
558 }
560 /// \brief Verify that the enumerator descriptor is well formed.
561 bool DIEnumerator::Verify() const {
562 return isEnumerator() && DbgNode->getNumOperands() == 3;
563 }
565 /// \brief Verify that the subrange descriptor is well formed.
566 bool DISubrange::Verify() const {
567 return isSubrange() && DbgNode->getNumOperands() == 3;
568 }
570 /// \brief Verify that the lexical block descriptor is well formed.
571 bool DILexicalBlock::Verify() const {
572 return isLexicalBlock() && DbgNode->getNumOperands() == 6;
573 }
575 /// \brief Verify that the file-scoped lexical block descriptor is well formed.
576 bool DILexicalBlockFile::Verify() const {
577 return isLexicalBlockFile() && DbgNode->getNumOperands() == 3;
578 }
580 /// \brief Verify that the template type parameter descriptor is well formed.
581 bool DITemplateTypeParameter::Verify() const {
582 return isTemplateTypeParameter() && DbgNode->getNumOperands() == 7;
583 }
585 /// \brief Verify that the template value parameter descriptor is well formed.
586 bool DITemplateValueParameter::Verify() const {
587 return isTemplateValueParameter() && DbgNode->getNumOperands() == 8;
588 }
590 /// \brief Verify that the imported module descriptor is well formed.
591 bool DIImportedModule::Verify() const {
592 return isImportedModule() && DbgNode->getNumOperands() == 4;
593 }
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();
622 }
624 /// getObjCProperty - Return property node, if this ivar is associated with one.
625 MDNode *DIDerivedType::getObjCProperty() const {
626 if (DbgNode->getNumOperands() <= 10)
627 return NULL;
628 return dyn_cast_or_null<MDNode>(DbgNode->getOperand(10));
629 }
631 /// \brief Set the array of member DITypes.
632 void DICompositeType::setTypeArray(DIArray Elements, DIArray TParams) {
633 assert((!TParams || DbgNode->getNumOperands() == 14) &&
634 "If you're setting the template parameters this should include a slot "
635 "for that!");
636 TrackingVH<MDNode> N(*this);
637 N->replaceOperandWith(10, Elements);
638 if (TParams)
639 N->replaceOperandWith(13, TParams);
640 DbgNode = N;
641 }
643 /// \brief Set the containing type.
644 void DICompositeType::setContainingType(DICompositeType ContainingType) {
645 TrackingVH<MDNode> N(*this);
646 N->replaceOperandWith(12, ContainingType);
647 DbgNode = N;
648 }
650 /// isInlinedFnArgument - Return true if this variable provides debugging
651 /// information for an inlined function arguments.
652 bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
653 assert(CurFn && "Invalid function");
654 if (!getContext().isSubprogram())
655 return false;
656 // This variable is not inlined function argument if its scope
657 // does not describe current function.
658 return !DISubprogram(getContext()).describes(CurFn);
659 }
661 /// describes - Return true if this subprogram provides debugging
662 /// information for the function F.
663 bool DISubprogram::describes(const Function *F) {
664 assert(F && "Invalid function");
665 if (F == getFunction())
666 return true;
667 StringRef Name = getLinkageName();
668 if (Name.empty())
669 Name = getName();
670 if (F->getName() == Name)
671 return true;
672 return false;
673 }
675 unsigned DISubprogram::isOptimized() const {
676 assert (DbgNode && "Invalid subprogram descriptor!");
677 if (DbgNode->getNumOperands() == 15)
678 return getUnsignedField(14);
679 return 0;
680 }
682 MDNode *DISubprogram::getVariablesNodes() const {
683 if (!DbgNode || DbgNode->getNumOperands() <= 18)
684 return NULL;
685 return dyn_cast_or_null<MDNode>(DbgNode->getOperand(18));
686 }
688 DIArray DISubprogram::getVariables() const {
689 if (!DbgNode || DbgNode->getNumOperands() <= 18)
690 return DIArray();
691 if (MDNode *T = dyn_cast_or_null<MDNode>(DbgNode->getOperand(18)))
692 return DIArray(T);
693 return DIArray();
694 }
696 StringRef DIScope::getFilename() const {
697 if (!DbgNode)
698 return StringRef();
699 return ::getStringField(getNodeField(DbgNode, 1), 0);
700 }
702 StringRef DIScope::getDirectory() const {
703 if (!DbgNode)
704 return StringRef();
705 return ::getStringField(getNodeField(DbgNode, 1), 1);
706 }
708 DIArray DICompileUnit::getEnumTypes() const {
709 if (!DbgNode || DbgNode->getNumOperands() < 13)
710 return DIArray();
712 if (MDNode *N = dyn_cast_or_null<MDNode>(DbgNode->getOperand(7)))
713 return DIArray(N);
714 return DIArray();
715 }
717 DIArray DICompileUnit::getRetainedTypes() const {
718 if (!DbgNode || DbgNode->getNumOperands() < 13)
719 return DIArray();
721 if (MDNode *N = dyn_cast_or_null<MDNode>(DbgNode->getOperand(8)))
722 return DIArray(N);
723 return DIArray();
724 }
726 DIArray DICompileUnit::getSubprograms() const {
727 if (!DbgNode || DbgNode->getNumOperands() < 13)
728 return DIArray();
730 if (MDNode *N = dyn_cast_or_null<MDNode>(DbgNode->getOperand(9)))
731 return DIArray(N);
732 return DIArray();
733 }
736 DIArray DICompileUnit::getGlobalVariables() const {
737 if (!DbgNode || DbgNode->getNumOperands() < 13)
738 return DIArray();
740 if (MDNode *N = dyn_cast_or_null<MDNode>(DbgNode->getOperand(10)))
741 return DIArray(N);
742 return DIArray();
743 }
745 DIArray DICompileUnit::getImportedModules() const {
746 if (!DbgNode || DbgNode->getNumOperands() < 13)
747 return DIArray();
749 if (MDNode *N = dyn_cast_or_null<MDNode>(DbgNode->getOperand(11)))
750 return DIArray(N);
751 return DIArray();
752 }
754 /// fixupObjcLikeName - Replace contains special characters used
755 /// in a typical Objective-C names with '.' in a given string.
756 static void fixupObjcLikeName(StringRef Str, SmallVectorImpl<char> &Out) {
757 bool isObjCLike = false;
758 for (size_t i = 0, e = Str.size(); i < e; ++i) {
759 char C = Str[i];
760 if (C == '[')
761 isObjCLike = true;
763 if (isObjCLike && (C == '[' || C == ']' || C == ' ' || C == ':' ||
764 C == '+' || C == '(' || C == ')'))
765 Out.push_back('.');
766 else
767 Out.push_back(C);
768 }
769 }
771 /// getFnSpecificMDNode - Return a NameMDNode, if available, that is
772 /// suitable to hold function specific information.
773 NamedMDNode *llvm::getFnSpecificMDNode(const Module &M, DISubprogram Fn) {
774 SmallString<32> Name = StringRef("llvm.dbg.lv.");
775 StringRef FName = "fn";
776 if (Fn.getFunction())
777 FName = Fn.getFunction()->getName();
778 else
779 FName = Fn.getName();
780 char One = '\1';
781 if (FName.startswith(StringRef(&One, 1)))
782 FName = FName.substr(1);
783 fixupObjcLikeName(FName, Name);
784 return M.getNamedMetadata(Name.str());
785 }
787 /// getOrInsertFnSpecificMDNode - Return a NameMDNode that is suitable
788 /// to hold function specific information.
789 NamedMDNode *llvm::getOrInsertFnSpecificMDNode(Module &M, DISubprogram Fn) {
790 SmallString<32> Name = StringRef("llvm.dbg.lv.");
791 StringRef FName = "fn";
792 if (Fn.getFunction())
793 FName = Fn.getFunction()->getName();
794 else
795 FName = Fn.getName();
796 char One = '\1';
797 if (FName.startswith(StringRef(&One, 1)))
798 FName = FName.substr(1);
799 fixupObjcLikeName(FName, Name);
801 return M.getOrInsertNamedMetadata(Name.str());
802 }
804 /// createInlinedVariable - Create a new inlined variable based on current
805 /// variable.
806 /// @param DV Current Variable.
807 /// @param InlinedScope Location at current variable is inlined.
808 DIVariable llvm::createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
809 LLVMContext &VMContext) {
810 SmallVector<Value *, 16> Elts;
811 // Insert inlined scope as 7th element.
812 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
813 i == 7 ? Elts.push_back(InlinedScope) :
814 Elts.push_back(DV->getOperand(i));
815 return DIVariable(MDNode::get(VMContext, Elts));
816 }
818 /// cleanseInlinedVariable - Remove inlined scope from the variable.
819 DIVariable llvm::cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext) {
820 SmallVector<Value *, 16> Elts;
821 // Insert inlined scope as 7th element.
822 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
823 i == 7 ?
824 Elts.push_back(Constant::getNullValue(Type::getInt32Ty(VMContext))):
825 Elts.push_back(DV->getOperand(i));
826 return DIVariable(MDNode::get(VMContext, Elts));
827 }
829 /// getDISubprogram - Find subprogram that is enclosing this scope.
830 DISubprogram llvm::getDISubprogram(const MDNode *Scope) {
831 DIDescriptor D(Scope);
832 if (D.isSubprogram())
833 return DISubprogram(Scope);
835 if (D.isLexicalBlockFile())
836 return getDISubprogram(DILexicalBlockFile(Scope).getContext());
838 if (D.isLexicalBlock())
839 return getDISubprogram(DILexicalBlock(Scope).getContext());
841 return DISubprogram();
842 }
844 /// getDICompositeType - Find underlying composite type.
845 DICompositeType llvm::getDICompositeType(DIType T) {
846 if (T.isCompositeType())
847 return DICompositeType(T);
849 if (T.isDerivedType())
850 return getDICompositeType(DIDerivedType(T).getTypeDerivedFrom());
852 return DICompositeType();
853 }
855 /// isSubprogramContext - Return true if Context is either a subprogram
856 /// or another context nested inside a subprogram.
857 bool llvm::isSubprogramContext(const MDNode *Context) {
858 if (!Context)
859 return false;
860 DIDescriptor D(Context);
861 if (D.isSubprogram())
862 return true;
863 if (D.isType())
864 return isSubprogramContext(DIType(Context).getContext());
865 return false;
866 }
868 //===----------------------------------------------------------------------===//
869 // DebugInfoFinder implementations.
870 //===----------------------------------------------------------------------===//
872 /// processModule - Process entire module and collect debug info.
873 void DebugInfoFinder::processModule(const Module &M) {
874 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
875 for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
876 DICompileUnit CU(CU_Nodes->getOperand(i));
877 addCompileUnit(CU);
878 DIArray GVs = CU.getGlobalVariables();
879 for (unsigned i = 0, e = GVs.getNumElements(); i != e; ++i) {
880 DIGlobalVariable DIG(GVs.getElement(i));
881 if (addGlobalVariable(DIG))
882 processType(DIG.getType());
883 }
884 DIArray SPs = CU.getSubprograms();
885 for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i)
886 processSubprogram(DISubprogram(SPs.getElement(i)));
887 DIArray EnumTypes = CU.getEnumTypes();
888 for (unsigned i = 0, e = EnumTypes.getNumElements(); i != e; ++i)
889 processType(DIType(EnumTypes.getElement(i)));
890 DIArray RetainedTypes = CU.getRetainedTypes();
891 for (unsigned i = 0, e = RetainedTypes.getNumElements(); i != e; ++i)
892 processType(DIType(RetainedTypes.getElement(i)));
893 // FIXME: We really shouldn't be bailing out after visiting just one CU
894 return;
895 }
896 }
897 }
899 /// processLocation - Process DILocation.
900 void DebugInfoFinder::processLocation(DILocation Loc) {
901 if (!Loc.Verify()) return;
902 DIDescriptor S(Loc.getScope());
903 if (S.isCompileUnit())
904 addCompileUnit(DICompileUnit(S));
905 else if (S.isSubprogram())
906 processSubprogram(DISubprogram(S));
907 else if (S.isLexicalBlock())
908 processLexicalBlock(DILexicalBlock(S));
909 else if (S.isLexicalBlockFile()) {
910 DILexicalBlockFile DBF = DILexicalBlockFile(S);
911 processLexicalBlock(DILexicalBlock(DBF.getScope()));
912 }
913 processLocation(Loc.getOrigLocation());
914 }
916 /// processType - Process DIType.
917 void DebugInfoFinder::processType(DIType DT) {
918 if (!addType(DT))
919 return;
920 if (DT.isCompositeType()) {
921 DICompositeType DCT(DT);
922 processType(DCT.getTypeDerivedFrom());
923 DIArray DA = DCT.getTypeArray();
924 for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
925 DIDescriptor D = DA.getElement(i);
926 if (D.isType())
927 processType(DIType(D));
928 else if (D.isSubprogram())
929 processSubprogram(DISubprogram(D));
930 }
931 } else if (DT.isDerivedType()) {
932 DIDerivedType DDT(DT);
933 processType(DDT.getTypeDerivedFrom());
934 }
935 }
937 /// processLexicalBlock
938 void DebugInfoFinder::processLexicalBlock(DILexicalBlock LB) {
939 DIScope Context = LB.getContext();
940 if (Context.isLexicalBlock())
941 return processLexicalBlock(DILexicalBlock(Context));
942 else if (Context.isLexicalBlockFile()) {
943 DILexicalBlockFile DBF = DILexicalBlockFile(Context);
944 return processLexicalBlock(DILexicalBlock(DBF.getScope()));
945 }
946 else
947 return processSubprogram(DISubprogram(Context));
948 }
950 /// processSubprogram - Process DISubprogram.
951 void DebugInfoFinder::processSubprogram(DISubprogram SP) {
952 if (!addSubprogram(SP))
953 return;
954 processType(SP.getType());
955 }
957 /// processDeclare - Process DbgDeclareInst.
958 void DebugInfoFinder::processDeclare(const DbgDeclareInst *DDI) {
959 MDNode *N = dyn_cast<MDNode>(DDI->getVariable());
960 if (!N) return;
962 DIDescriptor DV(N);
963 if (!DV.isVariable())
964 return;
966 if (!NodesSeen.insert(DV))
967 return;
968 processType(DIVariable(N).getType());
969 }
971 /// addType - Add type into Tys.
972 bool DebugInfoFinder::addType(DIType DT) {
973 if (!DT.isValid())
974 return false;
976 if (!NodesSeen.insert(DT))
977 return false;
979 TYs.push_back(DT);
980 return true;
981 }
983 /// addCompileUnit - Add compile unit into CUs.
984 bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
985 if (!CU.Verify())
986 return false;
988 if (!NodesSeen.insert(CU))
989 return false;
991 CUs.push_back(CU);
992 return true;
993 }
995 /// addGlobalVariable - Add global variable into GVs.
996 bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
997 if (!DIDescriptor(DIG).isGlobalVariable())
998 return false;
1000 if (!NodesSeen.insert(DIG))
1001 return false;
1003 GVs.push_back(DIG);
1004 return true;
1005 }
1007 // addSubprogram - Add subprgoram into SPs.
1008 bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
1009 if (!DIDescriptor(SP).isSubprogram())
1010 return false;
1012 if (!NodesSeen.insert(SP))
1013 return false;
1015 SPs.push_back(SP);
1016 return true;
1017 }
1019 //===----------------------------------------------------------------------===//
1020 // DIDescriptor: dump routines for all descriptors.
1021 //===----------------------------------------------------------------------===//
1023 /// dump - Print descriptor to dbgs() with a newline.
1024 void DIDescriptor::dump() const {
1025 print(dbgs()); dbgs() << '\n';
1026 }
1028 /// print - Print descriptor.
1029 void DIDescriptor::print(raw_ostream &OS) const {
1030 if (!DbgNode) return;
1032 if (const char *Tag = dwarf::TagString(getTag()))
1033 OS << "[ " << Tag << " ]";
1035 if (this->isSubrange()) {
1036 DISubrange(DbgNode).printInternal(OS);
1037 } else if (this->isCompileUnit()) {
1038 DICompileUnit(DbgNode).printInternal(OS);
1039 } else if (this->isFile()) {
1040 DIFile(DbgNode).printInternal(OS);
1041 } else if (this->isEnumerator()) {
1042 DIEnumerator(DbgNode).printInternal(OS);
1043 } else if (this->isBasicType()) {
1044 DIType(DbgNode).printInternal(OS);
1045 } else if (this->isDerivedType()) {
1046 DIDerivedType(DbgNode).printInternal(OS);
1047 } else if (this->isCompositeType()) {
1048 DICompositeType(DbgNode).printInternal(OS);
1049 } else if (this->isSubprogram()) {
1050 DISubprogram(DbgNode).printInternal(OS);
1051 } else if (this->isGlobalVariable()) {
1052 DIGlobalVariable(DbgNode).printInternal(OS);
1053 } else if (this->isVariable()) {
1054 DIVariable(DbgNode).printInternal(OS);
1055 } else if (this->isObjCProperty()) {
1056 DIObjCProperty(DbgNode).printInternal(OS);
1057 } else if (this->isNameSpace()) {
1058 DINameSpace(DbgNode).printInternal(OS);
1059 } else if (this->isScope()) {
1060 DIScope(DbgNode).printInternal(OS);
1061 }
1062 }
1064 void DISubrange::printInternal(raw_ostream &OS) const {
1065 int64_t Count = getCount();
1066 if (Count != -1)
1067 OS << " [" << getLo() << ", " << Count - 1 << ']';
1068 else
1069 OS << " [unbounded]";
1070 }
1072 void DIScope::printInternal(raw_ostream &OS) const {
1073 OS << " [" << getDirectory() << "/" << getFilename() << ']';
1074 }
1076 void DICompileUnit::printInternal(raw_ostream &OS) const {
1077 DIScope::printInternal(OS);
1078 OS << " [";
1079 unsigned Lang = getLanguage();
1080 if (const char *LangStr = dwarf::LanguageString(Lang))
1081 OS << LangStr;
1082 else
1083 (OS << "lang 0x").write_hex(Lang);
1084 OS << ']';
1085 }
1087 void DIEnumerator::printInternal(raw_ostream &OS) const {
1088 OS << " [" << getName() << " :: " << getEnumValue() << ']';
1089 }
1091 void DIType::printInternal(raw_ostream &OS) const {
1092 if (!DbgNode) return;
1094 StringRef Res = getName();
1095 if (!Res.empty())
1096 OS << " [" << Res << "]";
1098 // TODO: Print context?
1100 OS << " [line " << getLineNumber()
1101 << ", size " << getSizeInBits()
1102 << ", align " << getAlignInBits()
1103 << ", offset " << getOffsetInBits();
1104 if (isBasicType())
1105 if (const char *Enc =
1106 dwarf::AttributeEncodingString(DIBasicType(DbgNode).getEncoding()))
1107 OS << ", enc " << Enc;
1108 OS << "]";
1110 if (isPrivate())
1111 OS << " [private]";
1112 else if (isProtected())
1113 OS << " [protected]";
1115 if (isArtificial())
1116 OS << " [artificial]";
1118 if (isForwardDecl())
1119 OS << " [fwd]";
1120 if (isVector())
1121 OS << " [vector]";
1122 if (isStaticMember())
1123 OS << " [static]";
1124 }
1126 void DIDerivedType::printInternal(raw_ostream &OS) const {
1127 DIType::printInternal(OS);
1128 OS << " [from " << getTypeDerivedFrom().getName() << ']';
1129 }
1131 void DICompositeType::printInternal(raw_ostream &OS) const {
1132 DIType::printInternal(OS);
1133 DIArray A = getTypeArray();
1134 OS << " [" << A.getNumElements() << " elements]";
1135 }
1137 void DINameSpace::printInternal(raw_ostream &OS) const {
1138 StringRef Name = getName();
1139 if (!Name.empty())
1140 OS << " [" << Name << ']';
1142 OS << " [line " << getLineNumber() << ']';
1143 }
1145 void DISubprogram::printInternal(raw_ostream &OS) const {
1146 // TODO : Print context
1147 OS << " [line " << getLineNumber() << ']';
1149 if (isLocalToUnit())
1150 OS << " [local]";
1152 if (isDefinition())
1153 OS << " [def]";
1155 if (getScopeLineNumber() != getLineNumber())
1156 OS << " [scope " << getScopeLineNumber() << "]";
1158 if (isPrivate())
1159 OS << " [private]";
1160 else if (isProtected())
1161 OS << " [protected]";
1163 StringRef Res = getName();
1164 if (!Res.empty())
1165 OS << " [" << Res << ']';
1166 }
1168 void DIGlobalVariable::printInternal(raw_ostream &OS) const {
1169 StringRef Res = getName();
1170 if (!Res.empty())
1171 OS << " [" << Res << ']';
1173 OS << " [line " << getLineNumber() << ']';
1175 // TODO : Print context
1177 if (isLocalToUnit())
1178 OS << " [local]";
1180 if (isDefinition())
1181 OS << " [def]";
1182 }
1184 void DIVariable::printInternal(raw_ostream &OS) const {
1185 StringRef Res = getName();
1186 if (!Res.empty())
1187 OS << " [" << Res << ']';
1189 OS << " [line " << getLineNumber() << ']';
1190 }
1192 void DIObjCProperty::printInternal(raw_ostream &OS) const {
1193 StringRef Name = getObjCPropertyName();
1194 if (!Name.empty())
1195 OS << " [" << Name << ']';
1197 OS << " [line " << getLineNumber()
1198 << ", properties " << getUnsignedField(6) << ']';
1199 }
1201 static void printDebugLoc(DebugLoc DL, raw_ostream &CommentOS,
1202 const LLVMContext &Ctx) {
1203 if (!DL.isUnknown()) { // Print source line info.
1204 DIScope Scope(DL.getScope(Ctx));
1205 // Omit the directory, because it's likely to be long and uninteresting.
1206 if (Scope.Verify())
1207 CommentOS << Scope.getFilename();
1208 else
1209 CommentOS << "<unknown>";
1210 CommentOS << ':' << DL.getLine();
1211 if (DL.getCol() != 0)
1212 CommentOS << ':' << DL.getCol();
1213 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(DL.getInlinedAt(Ctx));
1214 if (!InlinedAtDL.isUnknown()) {
1215 CommentOS << " @[ ";
1216 printDebugLoc(InlinedAtDL, CommentOS, Ctx);
1217 CommentOS << " ]";
1218 }
1219 }
1220 }
1222 void DIVariable::printExtendedName(raw_ostream &OS) const {
1223 const LLVMContext &Ctx = DbgNode->getContext();
1224 StringRef Res = getName();
1225 if (!Res.empty())
1226 OS << Res << "," << getLineNumber();
1227 if (MDNode *InlinedAt = getInlinedAt()) {
1228 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(InlinedAt);
1229 if (!InlinedAtDL.isUnknown()) {
1230 OS << " @[";
1231 printDebugLoc(InlinedAtDL, OS, Ctx);
1232 OS << "]";
1233 }
1234 }
1235 }