DwarfDebug.h revision 8aa61477e3cbc6ebc399274042799a5cf09629a1
1//===-- llvm/CodeGen/DwarfDebug.h - Dwarf Debug Framework ------*- 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 contains support for writing dwarf debug info into asm files. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef CODEGEN_ASMPRINTER_DWARFDEBUG_H__ 15#define CODEGEN_ASMPRINTER_DWARFDEBUG_H__ 16 17#include "llvm/CodeGen/AsmPrinter.h" 18#include "llvm/CodeGen/MachineLocation.h" 19#include "DIE.h" 20#include "llvm/ADT/DenseMap.h" 21#include "llvm/ADT/FoldingSet.h" 22#include "llvm/ADT/SmallPtrSet.h" 23#include "llvm/ADT/StringMap.h" 24#include "llvm/ADT/UniqueVector.h" 25#include "llvm/Support/Allocator.h" 26 27namespace llvm { 28 29class CompileUnit; 30class DbgConcreteScope; 31class DbgScope; 32class DbgVariable; 33class MachineFrameInfo; 34class MachineModuleInfo; 35class MachineOperand; 36class MCAsmInfo; 37class DIEAbbrev; 38class DIE; 39class DIEBlock; 40class DIEEntry; 41 42class DIEnumerator; 43class DIDescriptor; 44class DIVariable; 45class DIGlobal; 46class DIGlobalVariable; 47class DISubprogram; 48class DIBasicType; 49class DIDerivedType; 50class DIType; 51class DINameSpace; 52class DISubrange; 53class DICompositeType; 54 55//===----------------------------------------------------------------------===// 56/// SrcLineInfo - This class is used to record source line correspondence. 57/// 58class SrcLineInfo { 59 unsigned Line; // Source line number. 60 unsigned Column; // Source column. 61 unsigned SourceID; // Source ID number. 62 MCSymbol *Label; // Label in code ID number. 63public: 64 SrcLineInfo(unsigned L, unsigned C, unsigned S, MCSymbol *label) 65 : Line(L), Column(C), SourceID(S), Label(label) {} 66 67 // Accessors 68 unsigned getLine() const { return Line; } 69 unsigned getColumn() const { return Column; } 70 unsigned getSourceID() const { return SourceID; } 71 MCSymbol *getLabel() const { return Label; } 72}; 73 74class DwarfDebug { 75 /// Asm - Target of Dwarf emission. 76 AsmPrinter *Asm; 77 78 /// MMI - Collected machine module information. 79 MachineModuleInfo *MMI; 80 81 //===--------------------------------------------------------------------===// 82 // Attributes used to construct specific Dwarf sections. 83 // 84 85 CompileUnit *FirstCU; 86 DenseMap <const MDNode *, CompileUnit *> CUMap; 87 88 /// AbbreviationsSet - Used to uniquely define abbreviations. 89 /// 90 FoldingSet<DIEAbbrev> AbbreviationsSet; 91 92 /// Abbreviations - A list of all the unique abbreviations in use. 93 /// 94 std::vector<DIEAbbrev *> Abbreviations; 95 96 /// DirectoryIdMap - Directory name to directory id map. 97 /// 98 StringMap<unsigned> DirectoryIdMap; 99 100 /// DirectoryNames - A list of directory names. 101 SmallVector<std::string, 8> DirectoryNames; 102 103 /// SourceFileIdMap - Source file name to source file id map. 104 /// 105 StringMap<unsigned> SourceFileIdMap; 106 107 /// SourceFileNames - A list of source file names. 108 SmallVector<std::string, 8> SourceFileNames; 109 110 /// SourceIdMap - Source id map, i.e. pair of directory id and source file 111 /// id mapped to a unique id. 112 DenseMap<std::pair<unsigned, unsigned>, unsigned> SourceIdMap; 113 114 /// SourceIds - Reverse map from source id to directory id + file id pair. 115 /// 116 SmallVector<std::pair<unsigned, unsigned>, 8> SourceIds; 117 118 /// Lines - List of source line correspondence. 119 std::vector<SrcLineInfo> Lines; 120 121 /// DIEBlocks - A list of all the DIEBlocks in use. 122 std::vector<DIEBlock *> DIEBlocks; 123 124 // DIEValueAllocator - All DIEValues are allocated through this allocator. 125 BumpPtrAllocator DIEValueAllocator; 126 127 /// StringPool - A String->Symbol mapping of strings used by indirect 128 /// references. 129 StringMap<std::pair<MCSymbol*, unsigned> > StringPool; 130 unsigned NextStringPoolNumber; 131 132 MCSymbol *getStringPoolEntry(StringRef Str); 133 134 /// SectionMap - Provides a unique id per text section. 135 /// 136 UniqueVector<const MCSection*> SectionMap; 137 138 /// SectionSourceLines - Tracks line numbers per text section. 139 /// 140 std::vector<std::vector<SrcLineInfo> > SectionSourceLines; 141 142 // CurrentFnDbgScope - Top level scope for the current function. 143 // 144 DbgScope *CurrentFnDbgScope; 145 146 /// DbgScopeMap - Tracks the scopes in the current function. Owns the 147 /// contained DbgScope*s. 148 /// 149 DenseMap<const MDNode *, DbgScope *> DbgScopeMap; 150 151 /// ConcreteScopes - Tracks the concrete scopees in the current function. 152 /// These scopes are also included in DbgScopeMap. 153 DenseMap<const MDNode *, DbgScope *> ConcreteScopes; 154 155 /// AbstractScopes - Tracks the abstract scopes a module. These scopes are 156 /// not included DbgScopeMap. AbstractScopes owns its DbgScope*s. 157 DenseMap<const MDNode *, DbgScope *> AbstractScopes; 158 159 /// AbstractSPDies - Collection of abstract subprogram DIEs. 160 DenseMap<const MDNode *, DIE *> AbstractSPDies; 161 162 /// AbstractScopesList - Tracks abstract scopes constructed while processing 163 /// a function. This list is cleared during endFunction(). 164 SmallVector<DbgScope *, 4>AbstractScopesList; 165 166 /// AbstractVariables - Collection on abstract variables. Owned by the 167 /// DbgScopes in AbstractScopes. 168 DenseMap<const MDNode *, DbgVariable *> AbstractVariables; 169 170 /// DbgVariableToFrameIndexMap - Tracks frame index used to find 171 /// variable's value. 172 DenseMap<const DbgVariable *, int> DbgVariableToFrameIndexMap; 173 174 /// DbgVariableToDbgInstMap - Maps DbgVariable to corresponding DBG_VALUE 175 /// machine instruction. 176 DenseMap<const DbgVariable *, const MachineInstr *> DbgVariableToDbgInstMap; 177 178 /// DbgVariableLabelsMap - Maps DbgVariable to corresponding MCSymbol. 179 DenseMap<const DbgVariable *, const MCSymbol *> DbgVariableLabelsMap; 180 181 /// DotDebugLocEntry - This struct describes location entries emitted in 182 /// .debug_loc section. 183 typedef struct DotDebugLocEntry { 184 const MCSymbol *Begin; 185 const MCSymbol *End; 186 MachineLocation Loc; 187 DotDebugLocEntry() : Begin(0), End(0) {} 188 DotDebugLocEntry(const MCSymbol *B, const MCSymbol *E, 189 MachineLocation &L) : Begin(B), End(E), Loc(L) {} 190 /// Empty entries are also used as a trigger to emit temp label. Such 191 /// labels are referenced is used to find debug_loc offset for a given DIE. 192 bool isEmpty() { return Begin == 0 && End == 0; } 193 } DotDebugLocEntry; 194 195 /// DotDebugLocEntries - Collection of DotDebugLocEntry. 196 SmallVector<DotDebugLocEntry, 4> DotDebugLocEntries; 197 198 /// UseDotDebugLocEntry - DW_AT_location attributes for the DIEs in this set 199 /// idetifies corresponding .debug_loc entry offset. 200 SmallPtrSet<const DIE *, 4> UseDotDebugLocEntry; 201 202 /// VarToAbstractVarMap - Maps DbgVariable with corresponding Abstract 203 /// DbgVariable, if any. 204 DenseMap<const DbgVariable *, const DbgVariable *> VarToAbstractVarMap; 205 206 /// InliendSubprogramDIEs - Collection of subprgram DIEs that are marked 207 /// (at the end of the module) as DW_AT_inline. 208 SmallPtrSet<DIE *, 4> InlinedSubprogramDIEs; 209 210 /// ContainingTypeMap - This map is used to keep track of subprogram DIEs that 211 /// need DW_AT_containing_type attribute. This attribute points to a DIE that 212 /// corresponds to the MDNode mapped with the subprogram DIE. 213 DenseMap<DIE *, const MDNode *> ContainingTypeMap; 214 215 typedef SmallVector<DbgScope *, 2> ScopeVector; 216 217 SmallPtrSet<const MachineInstr *, 8> InsnsEndScopeSet; 218 219 /// InlineInfo - Keep track of inlined functions and their location. This 220 /// information is used to populate debug_inlined section. 221 typedef std::pair<const MCSymbol *, DIE *> InlineInfoLabels; 222 DenseMap<const MDNode *, SmallVector<InlineInfoLabels, 4> > InlineInfo; 223 SmallVector<const MDNode *, 4> InlinedSPNodes; 224 225 // ProcessedSPNodes - This is a collection of subprogram MDNodes that 226 // are processed to create DIEs. 227 SmallPtrSet<const MDNode *, 16> ProcessedSPNodes; 228 229 /// LabelsBeforeInsn - Maps instruction with label emitted before 230 /// instruction. 231 DenseMap<const MachineInstr *, MCSymbol *> LabelsBeforeInsn; 232 233 /// LabelsAfterInsn - Maps instruction with label emitted after 234 /// instruction. 235 DenseMap<const MachineInstr *, MCSymbol *> LabelsAfterInsn; 236 237 /// insnNeedsLabel - Collection of instructions that need a label to mark 238 /// a debuggging information entity. 239 SmallPtrSet<const MachineInstr *, 8> InsnNeedsLabel; 240 241 SmallVector<const MCSymbol *, 8> DebugRangeSymbols; 242 243 /// Previous instruction's location information. This is used to determine 244 /// label location to indicate scope boundries in dwarf debug info. 245 DebugLoc PrevInstLoc; 246 MCSymbol *PrevLabel; 247 248 struct FunctionDebugFrameInfo { 249 unsigned Number; 250 std::vector<MachineMove> Moves; 251 252 FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M) 253 : Number(Num), Moves(M) {} 254 }; 255 256 std::vector<FunctionDebugFrameInfo> DebugFrames; 257 258 // Section Symbols: these are assembler temporary labels that are emitted at 259 // the beginning of each supported dwarf section. These are used to form 260 // section offsets and are created by EmitSectionLabels. 261 MCSymbol *DwarfFrameSectionSym, *DwarfInfoSectionSym, *DwarfAbbrevSectionSym; 262 MCSymbol *DwarfStrSectionSym, *TextSectionSym, *DwarfDebugRangeSectionSym; 263 MCSymbol *DwarfDebugLocSectionSym; 264 MCSymbol *DwarfDebugLineSectionSym, *CurrentLineSectionSym; 265 MCSymbol *FunctionBeginSym, *FunctionEndSym; 266private: 267 268 /// getSourceDirectoryAndFileIds - Return the directory and file ids that 269 /// maps to the source id. Source id starts at 1. 270 std::pair<unsigned, unsigned> 271 getSourceDirectoryAndFileIds(unsigned SId) const { 272 return SourceIds[SId-1]; 273 } 274 275 /// getNumSourceDirectories - Return the number of source directories in the 276 /// debug info. 277 unsigned getNumSourceDirectories() const { 278 return DirectoryNames.size(); 279 } 280 281 /// getSourceDirectoryName - Return the name of the directory corresponding 282 /// to the id. 283 const std::string &getSourceDirectoryName(unsigned Id) const { 284 return DirectoryNames[Id - 1]; 285 } 286 287 /// getSourceFileName - Return the name of the source file corresponding 288 /// to the id. 289 const std::string &getSourceFileName(unsigned Id) const { 290 return SourceFileNames[Id - 1]; 291 } 292 293 /// getNumSourceIds - Return the number of unique source ids. 294 unsigned getNumSourceIds() const { 295 return SourceIds.size(); 296 } 297 298 /// assignAbbrevNumber - Define a unique number for the abbreviation. 299 /// 300 void assignAbbrevNumber(DIEAbbrev &Abbrev); 301 302 /// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug 303 /// information entry. 304 DIEEntry *createDIEEntry(DIE *Entry); 305 306 /// addUInt - Add an unsigned integer attribute data and value. 307 /// 308 void addUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer); 309 310 /// addSInt - Add an signed integer attribute data and value. 311 /// 312 void addSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer); 313 314 /// addString - Add a string attribute data and value. 315 /// 316 void addString(DIE *Die, unsigned Attribute, unsigned Form, 317 const StringRef Str); 318 319 /// addLabel - Add a Dwarf label attribute data and value. 320 /// 321 void addLabel(DIE *Die, unsigned Attribute, unsigned Form, 322 const MCSymbol *Label); 323 324 /// addDelta - Add a label delta attribute data and value. 325 /// 326 void addDelta(DIE *Die, unsigned Attribute, unsigned Form, 327 const MCSymbol *Hi, const MCSymbol *Lo); 328 329 /// addDIEEntry - Add a DIE attribute data and value. 330 /// 331 void addDIEEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry); 332 333 /// addBlock - Add block data. 334 /// 335 void addBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block); 336 337 /// addSourceLine - Add location information to specified debug information 338 /// entry. 339 void addSourceLine(DIE *Die, const DIVariable *V); 340 void addSourceLine(DIE *Die, const DIGlobalVariable *G); 341 void addSourceLine(DIE *Die, const DISubprogram *SP); 342 void addSourceLine(DIE *Die, const DIType *Ty); 343 void addSourceLine(DIE *Die, const DINameSpace *NS); 344 345 /// addAddress - Add an address attribute to a die based on the location 346 /// provided. 347 void addAddress(DIE *Die, unsigned Attribute, 348 const MachineLocation &Location); 349 350 /// addRegisterAddress - Add register location entry in variable DIE. 351 bool addRegisterAddress(DIE *Die, const MCSymbol *VS, const MachineOperand &MO); 352 353 /// addConstantValue - Add constant value entry in variable DIE. 354 bool addConstantValue(DIE *Die, const MCSymbol *VS, const MachineOperand &MO); 355 356 /// addConstantFPValue - Add constant value entry in variable DIE. 357 bool addConstantFPValue(DIE *Die, const MCSymbol *VS, const MachineOperand &MO); 358 359 /// addComplexAddress - Start with the address based on the location provided, 360 /// and generate the DWARF information necessary to find the actual variable 361 /// (navigating the extra location information encoded in the type) based on 362 /// the starting location. Add the DWARF information to the die. 363 /// 364 void addComplexAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute, 365 const MachineLocation &Location); 366 367 // FIXME: Should be reformulated in terms of addComplexAddress. 368 /// addBlockByrefAddress - Start with the address based on the location 369 /// provided, and generate the DWARF information necessary to find the 370 /// actual Block variable (navigating the Block struct) based on the 371 /// starting location. Add the DWARF information to the die. Obsolete, 372 /// please use addComplexAddress instead. 373 /// 374 void addBlockByrefAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute, 375 const MachineLocation &Location); 376 377 /// addToContextOwner - Add Die into the list of its context owner's children. 378 void addToContextOwner(DIE *Die, DIDescriptor Context); 379 380 /// addType - Add a new type attribute to the specified entity. 381 void addType(DIE *Entity, DIType Ty); 382 383 384 /// getOrCreateNameSpace - Create a DIE for DINameSpace. 385 DIE *getOrCreateNameSpace(DINameSpace NS); 386 387 /// getOrCreateTypeDIE - Find existing DIE or create new DIE for the 388 /// given DIType. 389 DIE *getOrCreateTypeDIE(DIType Ty); 390 391 void addPubTypes(DISubprogram SP); 392 393 /// constructTypeDIE - Construct basic type die from DIBasicType. 394 void constructTypeDIE(DIE &Buffer, 395 DIBasicType BTy); 396 397 /// constructTypeDIE - Construct derived type die from DIDerivedType. 398 void constructTypeDIE(DIE &Buffer, 399 DIDerivedType DTy); 400 401 /// constructTypeDIE - Construct type DIE from DICompositeType. 402 void constructTypeDIE(DIE &Buffer, 403 DICompositeType CTy); 404 405 /// constructSubrangeDIE - Construct subrange DIE from DISubrange. 406 void constructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy); 407 408 /// constructArrayTypeDIE - Construct array type DIE from DICompositeType. 409 void constructArrayTypeDIE(DIE &Buffer, 410 DICompositeType *CTy); 411 412 /// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator. 413 DIE *constructEnumTypeDIE(DIEnumerator ETy); 414 415 /// createGlobalVariableDIE - Create new DIE using GV. 416 DIE *createGlobalVariableDIE(const DIGlobalVariable &GV); 417 418 /// createMemberDIE - Create new member DIE. 419 DIE *createMemberDIE(const DIDerivedType &DT); 420 421 /// createSubprogramDIE - Create new DIE using SP. 422 DIE *createSubprogramDIE(const DISubprogram &SP, bool MakeDecl = false); 423 424 /// getOrCreateDbgScope - Create DbgScope for the scope. 425 DbgScope *getOrCreateDbgScope(const MDNode *Scope, const MDNode *InlinedAt); 426 427 DbgScope *getOrCreateAbstractScope(const MDNode *N); 428 429 /// findAbstractVariable - Find abstract variable associated with Var. 430 DbgVariable *findAbstractVariable(DIVariable &Var, DebugLoc Loc); 431 432 /// updateSubprogramScopeDIE - Find DIE for the given subprogram and 433 /// attach appropriate DW_AT_low_pc and DW_AT_high_pc attributes. 434 /// If there are global variables in this scope then create and insert 435 /// DIEs for these variables. 436 DIE *updateSubprogramScopeDIE(const MDNode *SPNode); 437 438 /// constructLexicalScope - Construct new DW_TAG_lexical_block 439 /// for this scope and attach DW_AT_low_pc/DW_AT_high_pc labels. 440 DIE *constructLexicalScopeDIE(DbgScope *Scope); 441 442 /// constructInlinedScopeDIE - This scope represents inlined body of 443 /// a function. Construct DIE to represent this concrete inlined copy 444 /// of the function. 445 DIE *constructInlinedScopeDIE(DbgScope *Scope); 446 447 /// constructVariableDIE - Construct a DIE for the given DbgVariable. 448 DIE *constructVariableDIE(DbgVariable *DV, DbgScope *S); 449 450 /// constructScopeDIE - Construct a DIE for this scope. 451 DIE *constructScopeDIE(DbgScope *Scope); 452 453 /// EmitSectionLabels - Emit initial Dwarf sections with a label at 454 /// the start of each one. 455 void EmitSectionLabels(); 456 457 /// emitDIE - Recusively Emits a debug information entry. 458 /// 459 void emitDIE(DIE *Die); 460 461 /// computeSizeAndOffset - Compute the size and offset of a DIE. 462 /// 463 unsigned computeSizeAndOffset(DIE *Die, unsigned Offset, bool Last); 464 465 /// computeSizeAndOffsets - Compute the size and offset of all the DIEs. 466 /// 467 void computeSizeAndOffsets(); 468 469 /// EmitDebugInfo - Emit the debug info section. 470 /// 471 void emitDebugInfo(); 472 473 /// emitAbbreviations - Emit the abbreviation section. 474 /// 475 void emitAbbreviations() const; 476 477 /// emitEndOfLineMatrix - Emit the last address of the section and the end of 478 /// the line matrix. 479 /// 480 void emitEndOfLineMatrix(unsigned SectionEnd); 481 482 /// emitDebugLines - Emit source line information. 483 /// 484 void emitDebugLines(); 485 486 /// emitCommonDebugFrame - Emit common frame info into a debug frame section. 487 /// 488 void emitCommonDebugFrame(); 489 490 /// emitFunctionDebugFrame - Emit per function frame info into a debug frame 491 /// section. 492 void emitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo); 493 494 /// emitDebugPubNames - Emit visible names into a debug pubnames section. 495 /// 496 void emitDebugPubNames(); 497 498 /// emitDebugPubTypes - Emit visible types into a debug pubtypes section. 499 /// 500 void emitDebugPubTypes(); 501 502 /// emitDebugStr - Emit visible names into a debug str section. 503 /// 504 void emitDebugStr(); 505 506 /// emitDebugLoc - Emit visible names into a debug loc section. 507 /// 508 void emitDebugLoc(); 509 510 /// EmitDebugARanges - Emit visible names into a debug aranges section. 511 /// 512 void EmitDebugARanges(); 513 514 /// emitDebugRanges - Emit visible names into a debug ranges section. 515 /// 516 void emitDebugRanges(); 517 518 /// emitDebugMacInfo - Emit visible names into a debug macinfo section. 519 /// 520 void emitDebugMacInfo(); 521 522 /// emitDebugInlineInfo - Emit inline info using following format. 523 /// Section Header: 524 /// 1. length of section 525 /// 2. Dwarf version number 526 /// 3. address size. 527 /// 528 /// Entries (one "entry" for each function that was inlined): 529 /// 530 /// 1. offset into __debug_str section for MIPS linkage name, if exists; 531 /// otherwise offset into __debug_str for regular function name. 532 /// 2. offset into __debug_str section for regular function name. 533 /// 3. an unsigned LEB128 number indicating the number of distinct inlining 534 /// instances for the function. 535 /// 536 /// The rest of the entry consists of a {die_offset, low_pc} pair for each 537 /// inlined instance; the die_offset points to the inlined_subroutine die in 538 /// the __debug_info section, and the low_pc is the starting address for the 539 /// inlining instance. 540 void emitDebugInlineInfo(); 541 542 /// GetOrCreateSourceID - Look up the source id with the given directory and 543 /// source file names. If none currently exists, create a new id and insert it 544 /// in the SourceIds map. This can update DirectoryNames and SourceFileNames 545 /// maps as well. 546 unsigned GetOrCreateSourceID(StringRef DirName, StringRef FileName); 547 548 /// constructCompileUnit - Create new CompileUnit for the given 549 /// metadata node with tag DW_TAG_compile_unit. 550 void constructCompileUnit(const MDNode *N); 551 552 /// getCompielUnit - Get CompileUnit DIE. 553 CompileUnit *getCompileUnit(const MDNode *N) const; 554 555 /// constructGlobalVariableDIE - Construct global variable DIE. 556 void constructGlobalVariableDIE(const MDNode *N); 557 558 /// construct SubprogramDIE - Construct subprogram DIE. 559 void constructSubprogramDIE(const MDNode *N); 560 561 // FIXME: This should go away in favor of complex addresses. 562 /// Find the type the programmer originally declared the variable to be 563 /// and return that type. Obsolete, use GetComplexAddrType instead. 564 /// 565 DIType getBlockByrefType(DIType Ty, std::string Name); 566 567 /// recordSourceLine - Register a source line with debug info. Returns the 568 /// unique label that was emitted and which provides correspondence to 569 /// the source line list. 570 MCSymbol *recordSourceLine(unsigned Line, unsigned Col, const MDNode *Scope); 571 572 /// getSourceLineCount - Return the number of source lines in the debug 573 /// info. 574 unsigned getSourceLineCount() const { 575 return Lines.size(); 576 } 577 578 /// recordVariableFrameIndex - Record a variable's index. 579 void recordVariableFrameIndex(const DbgVariable *V, int Index); 580 581 /// findVariableFrameIndex - Return true if frame index for the variable 582 /// is found. Update FI to hold value of the index. 583 bool findVariableFrameIndex(const DbgVariable *V, int *FI); 584 585 /// findVariableLabel - Find MCSymbol for the variable. 586 const MCSymbol *findVariableLabel(const DbgVariable *V); 587 588 /// findDbgScope - Find DbgScope for the debug loc attached with an 589 /// instruction. 590 DbgScope *findDbgScope(const MachineInstr *MI); 591 592 /// identifyScopeMarkers() - Indentify instructions that are marking 593 /// beginning of or end of a scope. 594 void identifyScopeMarkers(); 595 596 /// extractScopeInformation - Scan machine instructions in this function 597 /// and collect DbgScopes. Return true, if atleast one scope was found. 598 bool extractScopeInformation(); 599 600 /// collectVariableInfo - Populate DbgScope entries with variables' info. 601 void collectVariableInfo(const MachineFunction *, 602 SmallPtrSet<const MDNode *, 16> &ProcessedVars); 603 604 /// collectVariableInfoFromMMITable - Collect variable information from 605 /// side table maintained by MMI. 606 void collectVariableInfoFromMMITable(const MachineFunction * MF, 607 SmallPtrSet<const MDNode *, 16> &P); 608public: 609 //===--------------------------------------------------------------------===// 610 // Main entry points. 611 // 612 DwarfDebug(AsmPrinter *A, Module *M); 613 ~DwarfDebug(); 614 615 /// beginModule - Emit all Dwarf sections that should come prior to the 616 /// content. 617 void beginModule(Module *M); 618 619 /// endModule - Emit all Dwarf sections that should come after the content. 620 /// 621 void endModule(); 622 623 /// beginFunction - Gather pre-function debug information. Assumes being 624 /// emitted immediately after the function entry point. 625 void beginFunction(const MachineFunction *MF); 626 627 /// endFunction - Gather and emit post-function debug information. 628 /// 629 void endFunction(const MachineFunction *MF); 630 631 /// getLabelBeforeInsn - Return Label preceding the instruction. 632 const MCSymbol *getLabelBeforeInsn(const MachineInstr *MI); 633 634 /// getLabelAfterInsn - Return Label immediately following the instruction. 635 const MCSymbol *getLabelAfterInsn(const MachineInstr *MI); 636 637 /// beginScope - Process beginning of a scope. 638 void beginScope(const MachineInstr *MI); 639 640 /// endScope - Prcess end of a scope. 641 void endScope(const MachineInstr *MI); 642}; 643} // End of namespace llvm 644 645#endif 646