1 //===- DIBuilder.h - Debug Information Builder ------------------*- C++ -*-===// 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 defines a DIBuilder that is useful for creating debugging 11 // information entries in LLVM IR form. 12 // 13 //===----------------------------------------------------------------------===// 14 15 #ifndef LLVM_IR_DIBUILDER_H 16 #define LLVM_IR_DIBUILDER_H 17 18 #include "llvm/ADT/ArrayRef.h" 19 #include "llvm/ADT/DenseMap.h" 20 #include "llvm/ADT/MapVector.h" 21 #include "llvm/ADT/None.h" 22 #include "llvm/ADT/SetVector.h" 23 #include "llvm/ADT/SmallVector.h" 24 #include "llvm/ADT/StringRef.h" 25 #include "llvm/IR/DebugInfo.h" 26 #include "llvm/IR/DebugInfoMetadata.h" 27 #include "llvm/IR/TrackingMDRef.h" 28 #include "llvm/Support/Casting.h" 29 #include <algorithm> 30 #include <cstdint> 31 32 namespace llvm { 33 34 class BasicBlock; 35 class Constant; 36 class Function; 37 class Instruction; 38 class LLVMContext; 39 class Module; 40 class Value; 41 42 class DIBuilder { 43 Module &M; 44 LLVMContext &VMContext; 45 46 DICompileUnit *CUNode; ///< The one compile unit created by this DIBuiler. 47 Function *DeclareFn; ///< llvm.dbg.declare 48 Function *ValueFn; ///< llvm.dbg.value 49 50 SmallVector<Metadata *, 4> AllEnumTypes; 51 /// Track the RetainTypes, since they can be updated later on. 52 SmallVector<TrackingMDNodeRef, 4> AllRetainTypes; 53 SmallVector<Metadata *, 4> AllSubprograms; 54 SmallVector<Metadata *, 4> AllGVs; 55 SmallVector<TrackingMDNodeRef, 4> AllImportedModules; 56 /// Map Macro parent (which can be DIMacroFile or nullptr) to a list of 57 /// Metadata all of type DIMacroNode. 58 /// DIMacroNode's with nullptr parent are DICompileUnit direct children. 59 MapVector<MDNode *, SetVector<Metadata *>> AllMacrosPerParent; 60 61 /// Track nodes that may be unresolved. 62 SmallVector<TrackingMDNodeRef, 4> UnresolvedNodes; 63 bool AllowUnresolvedNodes; 64 65 /// Each subprogram's preserved local variables. 66 /// 67 /// Do not use a std::vector. Some versions of libc++ apparently copy 68 /// instead of move on grow operations, and TrackingMDRef is expensive to 69 /// copy. 70 DenseMap<MDNode *, SmallVector<TrackingMDNodeRef, 1>> PreservedVariables; 71 72 /// Create a temporary. 73 /// 74 /// Create an \a temporary node and track it in \a UnresolvedNodes. 75 void trackIfUnresolved(MDNode *N); 76 77 public: 78 /// Construct a builder for a module. 79 /// 80 /// If \c AllowUnresolved, collect unresolved nodes attached to the module 81 /// in order to resolve cycles during \a finalize(). 82 explicit DIBuilder(Module &M, bool AllowUnresolved = true); 83 DIBuilder(const DIBuilder &) = delete; 84 DIBuilder &operator=(const DIBuilder &) = delete; 85 86 /// Construct any deferred debug info descriptors. 87 void finalize(); 88 89 /// Finalize a specific subprogram - no new variables may be added to this 90 /// subprogram afterwards. 91 void finalizeSubprogram(DISubprogram *SP); 92 93 /// A CompileUnit provides an anchor for all debugging 94 /// information generated during this instance of compilation. 95 /// \param Lang Source programming language, eg. dwarf::DW_LANG_C99 96 /// \param File File info. 97 /// \param Producer Identify the producer of debugging information 98 /// and code. Usually this is a compiler 99 /// version string. 100 /// \param isOptimized A boolean flag which indicates whether optimization 101 /// is enabled or not. 102 /// \param Flags This string lists command line options. This 103 /// string is directly embedded in debug info 104 /// output which may be used by a tool 105 /// analyzing generated debugging information. 106 /// \param RV This indicates runtime version for languages like 107 /// Objective-C. 108 /// \param SplitName The name of the file that we'll split debug info 109 /// out into. 110 /// \param Kind The kind of debug information to generate. 111 /// \param DWOId The DWOId if this is a split skeleton compile unit. 112 /// \param SplitDebugInlining Whether to emit inline debug info. 113 /// \param DebugInfoForProfiling Whether to emit extra debug info for 114 /// profile collection. 115 DICompileUnit * 116 createCompileUnit(unsigned Lang, DIFile *File, StringRef Producer, 117 bool isOptimized, StringRef Flags, unsigned RV, 118 StringRef SplitName = StringRef(), 119 DICompileUnit::DebugEmissionKind Kind = 120 DICompileUnit::DebugEmissionKind::FullDebug, 121 uint64_t DWOId = 0, bool SplitDebugInlining = true, 122 bool DebugInfoForProfiling = false); 123 124 /// Create a file descriptor to hold debugging information for a file. 125 /// \param Filename File name. 126 /// \param Directory Directory. 127 /// \param CSKind Checksum kind (e.g. CSK_None, CSK_MD5, CSK_SHA1, etc.). 128 /// \param Checksum Checksum data. 129 DIFile *createFile(StringRef Filename, StringRef Directory, 130 DIFile::ChecksumKind CSKind = DIFile::CSK_None, 131 StringRef Checksum = StringRef()); 132 133 /// Create debugging information entry for a macro. 134 /// \param Parent Macro parent (could be nullptr). 135 /// \param Line Source line number where the macro is defined. 136 /// \param MacroType DW_MACINFO_define or DW_MACINFO_undef. 137 /// \param Name Macro name. 138 /// \param Value Macro value. 139 DIMacro *createMacro(DIMacroFile *Parent, unsigned Line, unsigned MacroType, 140 StringRef Name, StringRef Value = StringRef()); 141 142 /// Create debugging information temporary entry for a macro file. 143 /// List of macro node direct children will be calculated by DIBuilder, 144 /// using the \p Parent relationship. 145 /// \param Parent Macro file parent (could be nullptr). 146 /// \param Line Source line number where the macro file is included. 147 /// \param File File descriptor containing the name of the macro file. 148 DIMacroFile *createTempMacroFile(DIMacroFile *Parent, unsigned Line, 149 DIFile *File); 150 151 /// Create a single enumerator value. 152 DIEnumerator *createEnumerator(StringRef Name, int64_t Val); 153 154 /// Create a DWARF unspecified type. 155 DIBasicType *createUnspecifiedType(StringRef Name); 156 157 /// Create C++11 nullptr type. 158 DIBasicType *createNullPtrType(); 159 160 /// Create debugging information entry for a basic 161 /// type. 162 /// \param Name Type name. 163 /// \param SizeInBits Size of the type. 164 /// \param Encoding DWARF encoding code, e.g. dwarf::DW_ATE_float. 165 DIBasicType *createBasicType(StringRef Name, uint64_t SizeInBits, 166 unsigned Encoding); 167 168 /// Create debugging information entry for a qualified 169 /// type, e.g. 'const int'. 170 /// \param Tag Tag identifing type, e.g. dwarf::TAG_volatile_type 171 /// \param FromTy Base Type. 172 DIDerivedType *createQualifiedType(unsigned Tag, DIType *FromTy); 173 174 /// Create debugging information entry for a pointer. 175 /// \param PointeeTy Type pointed by this pointer. 176 /// \param SizeInBits Size. 177 /// \param AlignInBits Alignment. (optional) 178 /// \param DWARFAddressSpace DWARF address space. (optional) 179 /// \param Name Pointer type name. (optional) 180 DIDerivedType *createPointerType(DIType *PointeeTy, uint64_t SizeInBits, 181 uint32_t AlignInBits = 0, 182 Optional<unsigned> DWARFAddressSpace = 183 None, 184 StringRef Name = ""); 185 186 /// Create debugging information entry for a pointer to member. 187 /// \param PointeeTy Type pointed to by this pointer. 188 /// \param SizeInBits Size. 189 /// \param AlignInBits Alignment. (optional) 190 /// \param Class Type for which this pointer points to members of. 191 DIDerivedType * 192 createMemberPointerType(DIType *PointeeTy, DIType *Class, 193 uint64_t SizeInBits, uint32_t AlignInBits = 0, 194 DINode::DIFlags Flags = DINode::FlagZero); 195 196 /// Create debugging information entry for a c++ 197 /// style reference or rvalue reference type. 198 DIDerivedType *createReferenceType(unsigned Tag, DIType *RTy, 199 uint64_t SizeInBits = 0, 200 uint32_t AlignInBits = 0, 201 Optional<unsigned> DWARFAddressSpace = 202 None); 203 204 /// Create debugging information entry for a typedef. 205 /// \param Ty Original type. 206 /// \param Name Typedef name. 207 /// \param File File where this type is defined. 208 /// \param LineNo Line number. 209 /// \param Context The surrounding context for the typedef. 210 DIDerivedType *createTypedef(DIType *Ty, StringRef Name, DIFile *File, 211 unsigned LineNo, DIScope *Context); 212 213 /// Create debugging information entry for a 'friend'. 214 DIDerivedType *createFriend(DIType *Ty, DIType *FriendTy); 215 216 /// Create debugging information entry to establish 217 /// inheritance relationship between two types. 218 /// \param Ty Original type. 219 /// \param BaseTy Base type. Ty is inherits from base. 220 /// \param BaseOffset Base offset. 221 /// \param Flags Flags to describe inheritance attribute, 222 /// e.g. private 223 DIDerivedType *createInheritance(DIType *Ty, DIType *BaseTy, 224 uint64_t BaseOffset, 225 DINode::DIFlags Flags); 226 227 /// Create debugging information entry for a member. 228 /// \param Scope Member scope. 229 /// \param Name Member name. 230 /// \param File File where this member is defined. 231 /// \param LineNo Line number. 232 /// \param SizeInBits Member size. 233 /// \param AlignInBits Member alignment. 234 /// \param OffsetInBits Member offset. 235 /// \param Flags Flags to encode member attribute, e.g. private 236 /// \param Ty Parent type. 237 DIDerivedType *createMemberType(DIScope *Scope, StringRef Name, 238 DIFile *File, unsigned LineNo, 239 uint64_t SizeInBits, 240 uint32_t AlignInBits, 241 uint64_t OffsetInBits, 242 DINode::DIFlags Flags, DIType *Ty); 243 244 /// Create debugging information entry for a bit field member. 245 /// \param Scope Member scope. 246 /// \param Name Member name. 247 /// \param File File where this member is defined. 248 /// \param LineNo Line number. 249 /// \param SizeInBits Member size. 250 /// \param OffsetInBits Member offset. 251 /// \param StorageOffsetInBits Member storage offset. 252 /// \param Flags Flags to encode member attribute. 253 /// \param Ty Parent type. 254 DIDerivedType *createBitFieldMemberType( 255 DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNo, 256 uint64_t SizeInBits, uint64_t OffsetInBits, 257 uint64_t StorageOffsetInBits, DINode::DIFlags Flags, DIType *Ty); 258 259 /// Create debugging information entry for a 260 /// C++ static data member. 261 /// \param Scope Member scope. 262 /// \param Name Member name. 263 /// \param File File where this member is declared. 264 /// \param LineNo Line number. 265 /// \param Ty Type of the static member. 266 /// \param Flags Flags to encode member attribute, e.g. private. 267 /// \param Val Const initializer of the member. 268 /// \param AlignInBits Member alignment. 269 DIDerivedType *createStaticMemberType(DIScope *Scope, StringRef Name, 270 DIFile *File, unsigned LineNo, 271 DIType *Ty, DINode::DIFlags Flags, 272 Constant *Val, 273 uint32_t AlignInBits = 0); 274 275 /// Create debugging information entry for Objective-C 276 /// instance variable. 277 /// \param Name Member name. 278 /// \param File File where this member is defined. 279 /// \param LineNo Line number. 280 /// \param SizeInBits Member size. 281 /// \param AlignInBits Member alignment. 282 /// \param OffsetInBits Member offset. 283 /// \param Flags Flags to encode member attribute, e.g. private 284 /// \param Ty Parent type. 285 /// \param PropertyNode Property associated with this ivar. 286 DIDerivedType *createObjCIVar(StringRef Name, DIFile *File, unsigned LineNo, 287 uint64_t SizeInBits, uint32_t AlignInBits, 288 uint64_t OffsetInBits, DINode::DIFlags Flags, 289 DIType *Ty, MDNode *PropertyNode); 290 291 /// Create debugging information entry for Objective-C 292 /// property. 293 /// \param Name Property name. 294 /// \param File File where this property is defined. 295 /// \param LineNumber Line number. 296 /// \param GetterName Name of the Objective C property getter selector. 297 /// \param SetterName Name of the Objective C property setter selector. 298 /// \param PropertyAttributes Objective C property attributes. 299 /// \param Ty Type. 300 DIObjCProperty *createObjCProperty(StringRef Name, DIFile *File, 301 unsigned LineNumber, 302 StringRef GetterName, 303 StringRef SetterName, 304 unsigned PropertyAttributes, DIType *Ty); 305 306 /// Create debugging information entry for a class. 307 /// \param Scope Scope in which this class is defined. 308 /// \param Name class name. 309 /// \param File File where this member is defined. 310 /// \param LineNumber Line number. 311 /// \param SizeInBits Member size. 312 /// \param AlignInBits Member alignment. 313 /// \param OffsetInBits Member offset. 314 /// \param Flags Flags to encode member attribute, e.g. private 315 /// \param Elements class members. 316 /// \param VTableHolder Debug info of the base class that contains vtable 317 /// for this type. This is used in 318 /// DW_AT_containing_type. See DWARF documentation 319 /// for more info. 320 /// \param TemplateParms Template type parameters. 321 /// \param UniqueIdentifier A unique identifier for the class. 322 DICompositeType *createClassType( 323 DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber, 324 uint64_t SizeInBits, uint32_t AlignInBits, uint64_t OffsetInBits, 325 DINode::DIFlags Flags, DIType *DerivedFrom, DINodeArray Elements, 326 DIType *VTableHolder = nullptr, MDNode *TemplateParms = nullptr, 327 StringRef UniqueIdentifier = ""); 328 329 /// Create debugging information entry for a struct. 330 /// \param Scope Scope in which this struct is defined. 331 /// \param Name Struct name. 332 /// \param File File where this member is defined. 333 /// \param LineNumber Line number. 334 /// \param SizeInBits Member size. 335 /// \param AlignInBits Member alignment. 336 /// \param Flags Flags to encode member attribute, e.g. private 337 /// \param Elements Struct elements. 338 /// \param RunTimeLang Optional parameter, Objective-C runtime version. 339 /// \param UniqueIdentifier A unique identifier for the struct. 340 DICompositeType *createStructType( 341 DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber, 342 uint64_t SizeInBits, uint32_t AlignInBits, DINode::DIFlags Flags, 343 DIType *DerivedFrom, DINodeArray Elements, unsigned RunTimeLang = 0, 344 DIType *VTableHolder = nullptr, StringRef UniqueIdentifier = ""); 345 346 /// Create debugging information entry for an union. 347 /// \param Scope Scope in which this union is defined. 348 /// \param Name Union name. 349 /// \param File File where this member is defined. 350 /// \param LineNumber Line number. 351 /// \param SizeInBits Member size. 352 /// \param AlignInBits Member alignment. 353 /// \param Flags Flags to encode member attribute, e.g. private 354 /// \param Elements Union elements. 355 /// \param RunTimeLang Optional parameter, Objective-C runtime version. 356 /// \param UniqueIdentifier A unique identifier for the union. 357 DICompositeType *createUnionType(DIScope *Scope, StringRef Name, 358 DIFile *File, unsigned LineNumber, 359 uint64_t SizeInBits, uint32_t AlignInBits, 360 DINode::DIFlags Flags, 361 DINodeArray Elements, 362 unsigned RunTimeLang = 0, 363 StringRef UniqueIdentifier = ""); 364 365 /// Create debugging information for template 366 /// type parameter. 367 /// \param Scope Scope in which this type is defined. 368 /// \param Name Type parameter name. 369 /// \param Ty Parameter type. 370 DITemplateTypeParameter * 371 createTemplateTypeParameter(DIScope *Scope, StringRef Name, DIType *Ty); 372 373 /// Create debugging information for template 374 /// value parameter. 375 /// \param Scope Scope in which this type is defined. 376 /// \param Name Value parameter name. 377 /// \param Ty Parameter type. 378 /// \param Val Constant parameter value. 379 DITemplateValueParameter *createTemplateValueParameter(DIScope *Scope, 380 StringRef Name, 381 DIType *Ty, 382 Constant *Val); 383 384 /// Create debugging information for a template template parameter. 385 /// \param Scope Scope in which this type is defined. 386 /// \param Name Value parameter name. 387 /// \param Ty Parameter type. 388 /// \param Val The fully qualified name of the template. 389 DITemplateValueParameter *createTemplateTemplateParameter(DIScope *Scope, 390 StringRef Name, 391 DIType *Ty, 392 StringRef Val); 393 394 /// Create debugging information for a template parameter pack. 395 /// \param Scope Scope in which this type is defined. 396 /// \param Name Value parameter name. 397 /// \param Ty Parameter type. 398 /// \param Val An array of types in the pack. 399 DITemplateValueParameter *createTemplateParameterPack(DIScope *Scope, 400 StringRef Name, 401 DIType *Ty, 402 DINodeArray Val); 403 404 /// Create debugging information entry for an array. 405 /// \param Size Array size. 406 /// \param AlignInBits Alignment. 407 /// \param Ty Element type. 408 /// \param Subscripts Subscripts. 409 DICompositeType *createArrayType(uint64_t Size, uint32_t AlignInBits, 410 DIType *Ty, DINodeArray Subscripts); 411 412 /// Create debugging information entry for a vector type. 413 /// \param Size Array size. 414 /// \param AlignInBits Alignment. 415 /// \param Ty Element type. 416 /// \param Subscripts Subscripts. 417 DICompositeType *createVectorType(uint64_t Size, uint32_t AlignInBits, 418 DIType *Ty, DINodeArray Subscripts); 419 420 /// Create debugging information entry for an 421 /// enumeration. 422 /// \param Scope Scope in which this enumeration is defined. 423 /// \param Name Union name. 424 /// \param File File where this member is defined. 425 /// \param LineNumber Line number. 426 /// \param SizeInBits Member size. 427 /// \param AlignInBits Member alignment. 428 /// \param Elements Enumeration elements. 429 /// \param UnderlyingType Underlying type of a C++11/ObjC fixed enum. 430 /// \param UniqueIdentifier A unique identifier for the enum. 431 DICompositeType *createEnumerationType( 432 DIScope *Scope, StringRef Name, DIFile *File, unsigned LineNumber, 433 uint64_t SizeInBits, uint32_t AlignInBits, DINodeArray Elements, 434 DIType *UnderlyingType, StringRef UniqueIdentifier = ""); 435 436 /// Create subroutine type. 437 /// \param ParameterTypes An array of subroutine parameter types. This 438 /// includes return type at 0th index. 439 /// \param Flags E.g.: LValueReference. 440 /// These flags are used to emit dwarf attributes. 441 /// \param CC Calling convention, e.g. dwarf::DW_CC_normal 442 DISubroutineType * 443 createSubroutineType(DITypeRefArray ParameterTypes, 444 DINode::DIFlags Flags = DINode::FlagZero, 445 unsigned CC = 0); 446 447 /// Create a new DIType* with "artificial" flag set. 448 DIType *createArtificialType(DIType *Ty); 449 450 /// Create a new DIType* with the "object pointer" 451 /// flag set. 452 DIType *createObjectPointerType(DIType *Ty); 453 454 /// Create a permanent forward-declared type. 455 DICompositeType *createForwardDecl(unsigned Tag, StringRef Name, 456 DIScope *Scope, DIFile *F, unsigned Line, 457 unsigned RuntimeLang = 0, 458 uint64_t SizeInBits = 0, 459 uint32_t AlignInBits = 0, 460 StringRef UniqueIdentifier = ""); 461 462 /// Create a temporary forward-declared type. 463 DICompositeType *createReplaceableCompositeType( 464 unsigned Tag, StringRef Name, DIScope *Scope, DIFile *F, unsigned Line, 465 unsigned RuntimeLang = 0, uint64_t SizeInBits = 0, 466 uint32_t AlignInBits = 0, DINode::DIFlags Flags = DINode::FlagFwdDecl, 467 StringRef UniqueIdentifier = ""); 468 469 /// Retain DIScope* in a module even if it is not referenced 470 /// through debug info anchors. 471 void retainType(DIScope *T); 472 473 /// Create unspecified parameter type 474 /// for a subroutine type. 475 DIBasicType *createUnspecifiedParameter(); 476 477 /// Get a DINodeArray, create one if required. 478 DINodeArray getOrCreateArray(ArrayRef<Metadata *> Elements); 479 480 /// Get a DIMacroNodeArray, create one if required. 481 DIMacroNodeArray getOrCreateMacroArray(ArrayRef<Metadata *> Elements); 482 483 /// Get a DITypeRefArray, create one if required. 484 DITypeRefArray getOrCreateTypeArray(ArrayRef<Metadata *> Elements); 485 486 /// Create a descriptor for a value range. This 487 /// implicitly uniques the values returned. 488 DISubrange *getOrCreateSubrange(int64_t Lo, int64_t Count); 489 490 /// Create a new descriptor for the specified variable. 491 /// \param Context Variable scope. 492 /// \param Name Name of the variable. 493 /// \param LinkageName Mangled name of the variable. 494 /// \param File File where this variable is defined. 495 /// \param LineNo Line number. 496 /// \param Ty Variable Type. 497 /// \param isLocalToUnit Boolean flag indicate whether this variable is 498 /// externally visible or not. 499 /// \param Expr The location of the global relative to the attached 500 /// GlobalVariable. 501 /// \param Decl Reference to the corresponding declaration. 502 /// \param AlignInBits Variable alignment(or 0 if no alignment attr was 503 /// specified) 504 DIGlobalVariableExpression *createGlobalVariableExpression( 505 DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *File, 506 unsigned LineNo, DIType *Ty, bool isLocalToUnit, 507 DIExpression *Expr = nullptr, MDNode *Decl = nullptr, 508 uint32_t AlignInBits = 0); 509 510 /// Identical to createGlobalVariable 511 /// except that the resulting DbgNode is temporary and meant to be RAUWed. 512 DIGlobalVariable *createTempGlobalVariableFwdDecl( 513 DIScope *Context, StringRef Name, StringRef LinkageName, DIFile *File, 514 unsigned LineNo, DIType *Ty, bool isLocalToUnit, MDNode *Decl = nullptr, 515 uint32_t AlignInBits = 0); 516 517 /// Create a new descriptor for an auto variable. This is a local variable 518 /// that is not a subprogram parameter. 519 /// 520 /// \c Scope must be a \a DILocalScope, and thus its scope chain eventually 521 /// leads to a \a DISubprogram. 522 /// 523 /// If \c AlwaysPreserve, this variable will be referenced from its 524 /// containing subprogram, and will survive some optimizations. 525 DILocalVariable * 526 createAutoVariable(DIScope *Scope, StringRef Name, DIFile *File, 527 unsigned LineNo, DIType *Ty, bool AlwaysPreserve = false, 528 DINode::DIFlags Flags = DINode::FlagZero, 529 uint32_t AlignInBits = 0); 530 531 /// Create a new descriptor for a parameter variable. 532 /// 533 /// \c Scope must be a \a DILocalScope, and thus its scope chain eventually 534 /// leads to a \a DISubprogram. 535 /// 536 /// \c ArgNo is the index (starting from \c 1) of this variable in the 537 /// subprogram parameters. \c ArgNo should not conflict with other 538 /// parameters of the same subprogram. 539 /// 540 /// If \c AlwaysPreserve, this variable will be referenced from its 541 /// containing subprogram, and will survive some optimizations. 542 DILocalVariable * 543 createParameterVariable(DIScope *Scope, StringRef Name, unsigned ArgNo, 544 DIFile *File, unsigned LineNo, DIType *Ty, 545 bool AlwaysPreserve = false, 546 DINode::DIFlags Flags = DINode::FlagZero); 547 548 /// Create a new descriptor for the specified 549 /// variable which has a complex address expression for its address. 550 /// \param Addr An array of complex address operations. 551 DIExpression *createExpression(ArrayRef<uint64_t> Addr = None); 552 DIExpression *createExpression(ArrayRef<int64_t> Addr); 553 554 /// Create a descriptor to describe one part 555 /// of aggregate variable that is fragmented across multiple Values. 556 /// 557 /// \param OffsetInBits Offset of the piece in bits. 558 /// \param SizeInBits Size of the piece in bits. 559 DIExpression *createFragmentExpression(unsigned OffsetInBits, 560 unsigned SizeInBits); 561 562 /// Create an expression for a variable that does not have an address, but 563 /// does have a constant value. 564 DIExpression *createConstantValueExpression(uint64_t Val) { 565 return DIExpression::get( 566 VMContext, {dwarf::DW_OP_constu, Val, dwarf::DW_OP_stack_value}); 567 } 568 569 /// Create a new descriptor for the specified subprogram. 570 /// See comments in DISubprogram* for descriptions of these fields. 571 /// \param Scope Function scope. 572 /// \param Name Function name. 573 /// \param LinkageName Mangled function name. 574 /// \param File File where this variable is defined. 575 /// \param LineNo Line number. 576 /// \param Ty Function type. 577 /// \param isLocalToUnit True if this function is not externally visible. 578 /// \param isDefinition True if this is a function definition. 579 /// \param ScopeLine Set to the beginning of the scope this starts 580 /// \param Flags e.g. is this function prototyped or not. 581 /// These flags are used to emit dwarf attributes. 582 /// \param isOptimized True if optimization is ON. 583 /// \param TParams Function template parameters. 584 /// \param ThrownTypes Exception types this function may throw. 585 DISubprogram *createFunction( 586 DIScope *Scope, StringRef Name, StringRef LinkageName, DIFile *File, 587 unsigned LineNo, DISubroutineType *Ty, bool isLocalToUnit, 588 bool isDefinition, unsigned ScopeLine, 589 DINode::DIFlags Flags = DINode::FlagZero, bool isOptimized = false, 590 DITemplateParameterArray TParams = nullptr, 591 DISubprogram *Decl = nullptr, DITypeArray ThrownTypes = nullptr); 592 593 /// Identical to createFunction, 594 /// except that the resulting DbgNode is meant to be RAUWed. 595 DISubprogram *createTempFunctionFwdDecl( 596 DIScope *Scope, StringRef Name, StringRef LinkageName, DIFile *File, 597 unsigned LineNo, DISubroutineType *Ty, bool isLocalToUnit, 598 bool isDefinition, unsigned ScopeLine, 599 DINode::DIFlags Flags = DINode::FlagZero, bool isOptimized = false, 600 DITemplateParameterArray TParams = nullptr, 601 DISubprogram *Decl = nullptr, DITypeArray ThrownTypes = nullptr); 602 603 /// Create a new descriptor for the specified C++ method. 604 /// See comments in \a DISubprogram* for descriptions of these fields. 605 /// \param Scope Function scope. 606 /// \param Name Function name. 607 /// \param LinkageName Mangled function name. 608 /// \param File File where this variable is defined. 609 /// \param LineNo Line number. 610 /// \param Ty Function type. 611 /// \param isLocalToUnit True if this function is not externally visible.. 612 /// \param isDefinition True if this is a function definition. 613 /// \param Virtuality Attributes describing virtualness. e.g. pure 614 /// virtual function. 615 /// \param VTableIndex Index no of this method in virtual table, or -1u if 616 /// unrepresentable. 617 /// \param ThisAdjustment 618 /// MS ABI-specific adjustment of 'this' that occurs 619 /// in the prologue. 620 /// \param VTableHolder Type that holds vtable. 621 /// \param Flags e.g. is this function prototyped or not. 622 /// This flags are used to emit dwarf attributes. 623 /// \param isOptimized True if optimization is ON. 624 /// \param TParams Function template parameters. 625 /// \param ThrownTypes Exception types this function may throw. 626 DISubprogram *createMethod( 627 DIScope *Scope, StringRef Name, StringRef LinkageName, DIFile *File, 628 unsigned LineNo, DISubroutineType *Ty, bool isLocalToUnit, 629 bool isDefinition, unsigned Virtuality = 0, unsigned VTableIndex = 0, 630 int ThisAdjustment = 0, DIType *VTableHolder = nullptr, 631 DINode::DIFlags Flags = DINode::FlagZero, bool isOptimized = false, 632 DITemplateParameterArray TParams = nullptr, 633 DITypeArray ThrownTypes = nullptr); 634 635 /// This creates new descriptor for a namespace with the specified 636 /// parent scope. 637 /// \param Scope Namespace scope 638 /// \param Name Name of this namespace 639 /// \param ExportSymbols True for C++ inline namespaces. 640 DINamespace *createNameSpace(DIScope *Scope, StringRef Name, 641 bool ExportSymbols); 642 643 /// This creates new descriptor for a module with the specified 644 /// parent scope. 645 /// \param Scope Parent scope 646 /// \param Name Name of this module 647 /// \param ConfigurationMacros 648 /// A space-separated shell-quoted list of -D macro 649 /// definitions as they would appear on a command line. 650 /// \param IncludePath The path to the module map file. 651 /// \param ISysRoot The clang system root (value of -isysroot). 652 DIModule *createModule(DIScope *Scope, StringRef Name, 653 StringRef ConfigurationMacros, 654 StringRef IncludePath, 655 StringRef ISysRoot); 656 657 /// This creates a descriptor for a lexical block with a new file 658 /// attached. This merely extends the existing 659 /// lexical block as it crosses a file. 660 /// \param Scope Lexical block. 661 /// \param File Source file. 662 /// \param Discriminator DWARF path discriminator value. 663 DILexicalBlockFile *createLexicalBlockFile(DIScope *Scope, DIFile *File, 664 unsigned Discriminator = 0); 665 666 /// This creates a descriptor for a lexical block with the 667 /// specified parent context. 668 /// \param Scope Parent lexical scope. 669 /// \param File Source file. 670 /// \param Line Line number. 671 /// \param Col Column number. 672 DILexicalBlock *createLexicalBlock(DIScope *Scope, DIFile *File, 673 unsigned Line, unsigned Col); 674 675 /// Create a descriptor for an imported module. 676 /// \param Context The scope this module is imported into 677 /// \param NS The namespace being imported here 678 /// \param Line Line number 679 DIImportedEntity *createImportedModule(DIScope *Context, DINamespace *NS, 680 unsigned Line); 681 682 /// Create a descriptor for an imported module. 683 /// \param Context The scope this module is imported into 684 /// \param NS An aliased namespace 685 /// \param Line Line number 686 DIImportedEntity *createImportedModule(DIScope *Context, 687 DIImportedEntity *NS, unsigned Line); 688 689 /// Create a descriptor for an imported module. 690 /// \param Context The scope this module is imported into 691 /// \param M The module being imported here 692 /// \param Line Line number 693 DIImportedEntity *createImportedModule(DIScope *Context, DIModule *M, 694 unsigned Line); 695 696 /// Create a descriptor for an imported function. 697 /// \param Context The scope this module is imported into 698 /// \param Decl The declaration (or definition) of a function, type, or 699 /// variable 700 /// \param Line Line number 701 DIImportedEntity *createImportedDeclaration(DIScope *Context, DINode *Decl, 702 unsigned Line, 703 StringRef Name = ""); 704 705 /// Insert a new llvm.dbg.declare intrinsic call. 706 /// \param Storage llvm::Value of the variable 707 /// \param VarInfo Variable's debug info descriptor. 708 /// \param Expr A complex location expression. 709 /// \param DL Debug info location. 710 /// \param InsertAtEnd Location for the new intrinsic. 711 Instruction *insertDeclare(llvm::Value *Storage, DILocalVariable *VarInfo, 712 DIExpression *Expr, const DILocation *DL, 713 BasicBlock *InsertAtEnd); 714 715 /// Insert a new llvm.dbg.declare intrinsic call. 716 /// \param Storage llvm::Value of the variable 717 /// \param VarInfo Variable's debug info descriptor. 718 /// \param Expr A complex location expression. 719 /// \param DL Debug info location. 720 /// \param InsertBefore Location for the new intrinsic. 721 Instruction *insertDeclare(llvm::Value *Storage, DILocalVariable *VarInfo, 722 DIExpression *Expr, const DILocation *DL, 723 Instruction *InsertBefore); 724 725 /// Insert a new llvm.dbg.value intrinsic call. 726 /// \param Val llvm::Value of the variable 727 /// \param Offset Offset 728 /// \param VarInfo Variable's debug info descriptor. 729 /// \param Expr A complex location expression. 730 /// \param DL Debug info location. 731 /// \param InsertAtEnd Location for the new intrinsic. 732 Instruction *insertDbgValueIntrinsic(llvm::Value *Val, uint64_t Offset, 733 DILocalVariable *VarInfo, 734 DIExpression *Expr, 735 const DILocation *DL, 736 BasicBlock *InsertAtEnd); 737 738 /// Insert a new llvm.dbg.value intrinsic call. 739 /// \param Val llvm::Value of the variable 740 /// \param Offset Offset 741 /// \param VarInfo Variable's debug info descriptor. 742 /// \param Expr A complex location expression. 743 /// \param DL Debug info location. 744 /// \param InsertBefore Location for the new intrinsic. 745 Instruction *insertDbgValueIntrinsic(llvm::Value *Val, uint64_t Offset, 746 DILocalVariable *VarInfo, 747 DIExpression *Expr, 748 const DILocation *DL, 749 Instruction *InsertBefore); 750 751 /// Replace the vtable holder in the given composite type. 752 /// 753 /// If this creates a self reference, it may orphan some unresolved cycles 754 /// in the operands of \c T, so \a DIBuilder needs to track that. 755 void replaceVTableHolder(DICompositeType *&T, 756 DICompositeType *VTableHolder); 757 758 /// Replace arrays on a composite type. 759 /// 760 /// If \c T is resolved, but the arrays aren't -- which can happen if \c T 761 /// has a self-reference -- \a DIBuilder needs to track the array to 762 /// resolve cycles. 763 void replaceArrays(DICompositeType *&T, DINodeArray Elements, 764 DINodeArray TParams = DINodeArray()); 765 766 /// Replace a temporary node. 767 /// 768 /// Call \a MDNode::replaceAllUsesWith() on \c N, replacing it with \c 769 /// Replacement. 770 /// 771 /// If \c Replacement is the same as \c N.get(), instead call \a 772 /// MDNode::replaceWithUniqued(). In this case, the uniqued node could 773 /// have a different address, so we return the final address. 774 template <class NodeTy> 775 NodeTy *replaceTemporary(TempMDNode &&N, NodeTy *Replacement) { 776 if (N.get() == Replacement) 777 return cast<NodeTy>(MDNode::replaceWithUniqued(std::move(N))); 778 779 N->replaceAllUsesWith(Replacement); 780 return Replacement; 781 } 782 }; 783 784 // Create wrappers for C Binding types (see CBindingWrapping.h). 785 DEFINE_ISA_CONVERSION_FUNCTIONS(DIBuilder, LLVMDIBuilderRef) 786 787 } // end namespace llvm 788 789 #endif // LLVM_IR_DIBUILDER_H 790
