DwarfDebug.h revision b2b31a6f93f5329c86e41c04ec8c33799d012f9e
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 /// AbstractScopesList - Tracks abstract scopes constructed while processing 160 /// a function. This list is cleared during endFunction(). 161 SmallVector<DbgScope *, 4>AbstractScopesList; 162 163 /// AbstractVariables - Collection on abstract variables. Owned by the 164 /// DbgScopes in AbstractScopes. 165 DenseMap<const MDNode *, DbgVariable *> AbstractVariables; 166 167 /// DbgVariableToFrameIndexMap - Tracks frame index used to find 168 /// variable's value. 169 DenseMap<const DbgVariable *, int> DbgVariableToFrameIndexMap; 170 171 /// DbgVariableToDbgInstMap - Maps DbgVariable to corresponding DBG_VALUE 172 /// machine instruction. 173 DenseMap<const DbgVariable *, const MachineInstr *> DbgVariableToDbgInstMap; 174 175 /// DbgVariableLabelsMap - Maps DbgVariable to corresponding MCSymbol. 176 DenseMap<const DbgVariable *, const MCSymbol *> DbgVariableLabelsMap; 177 178 /// DotDebugLocEntry - This struct describes location entries emitted in 179 /// .debug_loc section. 180 typedef struct DotDebugLocEntry { 181 const MCSymbol *Begin; 182 const MCSymbol *End; 183 MachineLocation Loc; 184 DotDebugLocEntry() : Begin(0), End(0) {} 185 DotDebugLocEntry(const MCSymbol *B, const MCSymbol *E, 186 MachineLocation &L) : Begin(B), End(E), Loc(L) {} 187 /// Empty entries are also used as a trigger to emit temp label. Such 188 /// labels are referenced is used to find debug_loc offset for a given DIE. 189 bool isEmpty() { return Begin == 0 && End == 0; } 190 } DotDebugLocEntry; 191 192 /// DotDebugLocEntries - Collection of DotDebugLocEntry. 193 SmallVector<DotDebugLocEntry, 4> DotDebugLocEntries; 194 195 /// UseDotDebugLocEntry - DW_AT_location attributes for the DIEs in this set 196 /// idetifies corresponding .debug_loc entry offset. 197 SmallPtrSet<const DIE *, 4> UseDotDebugLocEntry; 198 199 /// VarToAbstractVarMap - Maps DbgVariable with corresponding Abstract 200 /// DbgVariable, if any. 201 DenseMap<const DbgVariable *, const DbgVariable *> VarToAbstractVarMap; 202 203 /// InliendSubprogramDIEs - Collection of subprgram DIEs that are marked 204 /// (at the end of the module) as DW_AT_inline. 205 SmallPtrSet<DIE *, 4> InlinedSubprogramDIEs; 206 207 /// ContainingTypeMap - This map is used to keep track of subprogram DIEs that 208 /// need DW_AT_containing_type attribute. This attribute points to a DIE that 209 /// corresponds to the MDNode mapped with the subprogram DIE. 210 DenseMap<DIE *, const MDNode *> ContainingTypeMap; 211 212 typedef SmallVector<DbgScope *, 2> ScopeVector; 213 SmallPtrSet<const MachineInstr *, 8> InsnsBeginScopeSet; 214 SmallPtrSet<const MachineInstr *, 8> InsnsEndScopeSet; 215 216 /// InlineInfo - Keep track of inlined functions and their location. This 217 /// information is used to populate debug_inlined section. 218 typedef std::pair<const MCSymbol *, DIE *> InlineInfoLabels; 219 DenseMap<const MDNode *, SmallVector<InlineInfoLabels, 4> > InlineInfo; 220 SmallVector<const MDNode *, 4> InlinedSPNodes; 221 222 /// LabelsBeforeInsn - Maps instruction with label emitted before 223 /// instruction. 224 DenseMap<const MachineInstr *, MCSymbol *> LabelsBeforeInsn; 225 226 /// LabelsAfterInsn - Maps instruction with label emitted after 227 /// instruction. 228 DenseMap<const MachineInstr *, MCSymbol *> LabelsAfterInsn; 229 230 /// insnNeedsLabel - Collection of instructions that need a label to mark 231 /// a debuggging information entity. 232 SmallPtrSet<const MachineInstr *, 8> InsnNeedsLabel; 233 234 /// ProcessedArgs - Collection of arguments already processed. 235 SmallPtrSet<const MDNode *, 8> ProcessedArgs; 236 237 SmallVector<const MCSymbol *, 8> DebugRangeSymbols; 238 239 /// Previous instruction's location information. This is used to determine 240 /// label location to indicate scope boundries in dwarf debug info. 241 DebugLoc PrevInstLoc; 242 MCSymbol *PrevLabel; 243 244 struct FunctionDebugFrameInfo { 245 unsigned Number; 246 std::vector<MachineMove> Moves; 247 248 FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M) 249 : Number(Num), Moves(M) {} 250 }; 251 252 std::vector<FunctionDebugFrameInfo> DebugFrames; 253 254 // Section Symbols: these are assembler temporary labels that are emitted at 255 // the beginning of each supported dwarf section. These are used to form 256 // section offsets and are created by EmitSectionLabels. 257 MCSymbol *DwarfFrameSectionSym, *DwarfInfoSectionSym, *DwarfAbbrevSectionSym; 258 MCSymbol *DwarfStrSectionSym, *TextSectionSym, *DwarfDebugRangeSectionSym; 259 MCSymbol *DwarfDebugLocSectionSym; 260 MCSymbol *FunctionBeginSym, *FunctionEndSym; 261private: 262 263 /// getSourceDirectoryAndFileIds - Return the directory and file ids that 264 /// maps to the source id. Source id starts at 1. 265 std::pair<unsigned, unsigned> 266 getSourceDirectoryAndFileIds(unsigned SId) const { 267 return SourceIds[SId-1]; 268 } 269 270 /// getNumSourceDirectories - Return the number of source directories in the 271 /// debug info. 272 unsigned getNumSourceDirectories() const { 273 return DirectoryNames.size(); 274 } 275 276 /// getSourceDirectoryName - Return the name of the directory corresponding 277 /// to the id. 278 const std::string &getSourceDirectoryName(unsigned Id) const { 279 return DirectoryNames[Id - 1]; 280 } 281 282 /// getSourceFileName - Return the name of the source file corresponding 283 /// to the id. 284 const std::string &getSourceFileName(unsigned Id) const { 285 return SourceFileNames[Id - 1]; 286 } 287 288 /// getNumSourceIds - Return the number of unique source ids. 289 unsigned getNumSourceIds() const { 290 return SourceIds.size(); 291 } 292 293 /// assignAbbrevNumber - Define a unique number for the abbreviation. 294 /// 295 void assignAbbrevNumber(DIEAbbrev &Abbrev); 296 297 /// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug 298 /// information entry. 299 DIEEntry *createDIEEntry(DIE *Entry); 300 301 /// addUInt - Add an unsigned integer attribute data and value. 302 /// 303 void addUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer); 304 305 /// addSInt - Add an signed integer attribute data and value. 306 /// 307 void addSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer); 308 309 /// addString - Add a string attribute data and value. 310 /// 311 void addString(DIE *Die, unsigned Attribute, unsigned Form, 312 const StringRef Str); 313 314 /// addLabel - Add a Dwarf label attribute data and value. 315 /// 316 void addLabel(DIE *Die, unsigned Attribute, unsigned Form, 317 const MCSymbol *Label); 318 319 /// addDelta - Add a label delta attribute data and value. 320 /// 321 void addDelta(DIE *Die, unsigned Attribute, unsigned Form, 322 const MCSymbol *Hi, const MCSymbol *Lo); 323 324 /// addDIEEntry - Add a DIE attribute data and value. 325 /// 326 void addDIEEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry); 327 328 /// addBlock - Add block data. 329 /// 330 void addBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block); 331 332 /// addSourceLine - Add location information to specified debug information 333 /// entry. 334 void addSourceLine(DIE *Die, const DIVariable *V); 335 void addSourceLine(DIE *Die, const DIGlobalVariable *G); 336 void addSourceLine(DIE *Die, const DISubprogram *SP); 337 void addSourceLine(DIE *Die, const DIType *Ty); 338 void addSourceLine(DIE *Die, const DINameSpace *NS); 339 340 /// addAddress - Add an address attribute to a die based on the location 341 /// provided. 342 void addAddress(DIE *Die, unsigned Attribute, 343 const MachineLocation &Location); 344 345 /// addRegisterAddress - Add register location entry in variable DIE. 346 bool addRegisterAddress(DIE *Die, const MCSymbol *VS, const MachineOperand &MO); 347 348 /// addConstantValue - Add constant value entry in variable DIE. 349 bool addConstantValue(DIE *Die, const MCSymbol *VS, const MachineOperand &MO); 350 351 /// addConstantFPValue - Add constant value entry in variable DIE. 352 bool addConstantFPValue(DIE *Die, const MCSymbol *VS, const MachineOperand &MO); 353 354 /// addComplexAddress - Start with the address based on the location provided, 355 /// and generate the DWARF information necessary to find the actual variable 356 /// (navigating the extra location information encoded in the type) based on 357 /// the starting location. Add the DWARF information to the die. 358 /// 359 void addComplexAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute, 360 const MachineLocation &Location); 361 362 // FIXME: Should be reformulated in terms of addComplexAddress. 363 /// addBlockByrefAddress - Start with the address based on the location 364 /// provided, and generate the DWARF information necessary to find the 365 /// actual Block variable (navigating the Block struct) based on the 366 /// starting location. Add the DWARF information to the die. Obsolete, 367 /// please use addComplexAddress instead. 368 /// 369 void addBlockByrefAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute, 370 const MachineLocation &Location); 371 372 /// addToContextOwner - Add Die into the list of its context owner's children. 373 void addToContextOwner(DIE *Die, DIDescriptor Context); 374 375 /// addType - Add a new type attribute to the specified entity. 376 void addType(DIE *Entity, DIType Ty); 377 378 379 /// getOrCreateNameSpace - Create a DIE for DINameSpace. 380 DIE *getOrCreateNameSpace(DINameSpace NS); 381 382 /// getOrCreateTypeDIE - Find existing DIE or create new DIE for the 383 /// given DIType. 384 DIE *getOrCreateTypeDIE(DIType Ty); 385 386 void addPubTypes(DISubprogram SP); 387 388 /// constructTypeDIE - Construct basic type die from DIBasicType. 389 void constructTypeDIE(DIE &Buffer, 390 DIBasicType BTy); 391 392 /// constructTypeDIE - Construct derived type die from DIDerivedType. 393 void constructTypeDIE(DIE &Buffer, 394 DIDerivedType DTy); 395 396 /// constructTypeDIE - Construct type DIE from DICompositeType. 397 void constructTypeDIE(DIE &Buffer, 398 DICompositeType CTy); 399 400 /// constructSubrangeDIE - Construct subrange DIE from DISubrange. 401 void constructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy); 402 403 /// constructArrayTypeDIE - Construct array type DIE from DICompositeType. 404 void constructArrayTypeDIE(DIE &Buffer, 405 DICompositeType *CTy); 406 407 /// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator. 408 DIE *constructEnumTypeDIE(DIEnumerator ETy); 409 410 /// createGlobalVariableDIE - Create new DIE using GV. 411 DIE *createGlobalVariableDIE(const DIGlobalVariable &GV); 412 413 /// createMemberDIE - Create new member DIE. 414 DIE *createMemberDIE(const DIDerivedType &DT); 415 416 /// createSubprogramDIE - Create new DIE using SP. 417 DIE *createSubprogramDIE(const DISubprogram &SP, bool MakeDecl = false); 418 419 /// getOrCreateDbgScope - Create DbgScope for the scope. 420 DbgScope *getOrCreateDbgScope(const MDNode *Scope, const MDNode *InlinedAt); 421 422 DbgScope *getOrCreateAbstractScope(const MDNode *N); 423 424 /// findAbstractVariable - Find abstract variable associated with Var. 425 DbgVariable *findAbstractVariable(DIVariable &Var, DebugLoc Loc); 426 427 /// updateSubprogramScopeDIE - Find DIE for the given subprogram and 428 /// attach appropriate DW_AT_low_pc and DW_AT_high_pc attributes. 429 /// If there are global variables in this scope then create and insert 430 /// DIEs for these variables. 431 DIE *updateSubprogramScopeDIE(const MDNode *SPNode); 432 433 /// constructLexicalScope - Construct new DW_TAG_lexical_block 434 /// for this scope and attach DW_AT_low_pc/DW_AT_high_pc labels. 435 DIE *constructLexicalScopeDIE(DbgScope *Scope); 436 437 /// constructInlinedScopeDIE - This scope represents inlined body of 438 /// a function. Construct DIE to represent this concrete inlined copy 439 /// of the function. 440 DIE *constructInlinedScopeDIE(DbgScope *Scope); 441 442 /// constructVariableDIE - Construct a DIE for the given DbgVariable. 443 DIE *constructVariableDIE(DbgVariable *DV, DbgScope *S); 444 445 /// constructScopeDIE - Construct a DIE for this scope. 446 DIE *constructScopeDIE(DbgScope *Scope); 447 448 /// EmitSectionLabels - Emit initial Dwarf sections with a label at 449 /// the start of each one. 450 void EmitSectionLabels(); 451 452 /// emitDIE - Recusively Emits a debug information entry. 453 /// 454 void emitDIE(DIE *Die); 455 456 /// computeSizeAndOffset - Compute the size and offset of a DIE. 457 /// 458 unsigned computeSizeAndOffset(DIE *Die, unsigned Offset, bool Last); 459 460 /// computeSizeAndOffsets - Compute the size and offset of all the DIEs. 461 /// 462 void computeSizeAndOffsets(); 463 464 /// EmitDebugInfo - Emit the debug info section. 465 /// 466 void emitDebugInfo(); 467 468 /// emitAbbreviations - Emit the abbreviation section. 469 /// 470 void emitAbbreviations() const; 471 472 /// emitEndOfLineMatrix - Emit the last address of the section and the end of 473 /// the line matrix. 474 /// 475 void emitEndOfLineMatrix(unsigned SectionEnd); 476 477 /// emitDebugLines - Emit source line information. 478 /// 479 void emitDebugLines(); 480 481 /// emitCommonDebugFrame - Emit common frame info into a debug frame section. 482 /// 483 void emitCommonDebugFrame(); 484 485 /// emitFunctionDebugFrame - Emit per function frame info into a debug frame 486 /// section. 487 void emitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo); 488 489 /// emitDebugPubNames - Emit visible names into a debug pubnames section. 490 /// 491 void emitDebugPubNames(); 492 493 /// emitDebugPubTypes - Emit visible types into a debug pubtypes section. 494 /// 495 void emitDebugPubTypes(); 496 497 /// emitDebugStr - Emit visible names into a debug str section. 498 /// 499 void emitDebugStr(); 500 501 /// emitDebugLoc - Emit visible names into a debug loc section. 502 /// 503 void emitDebugLoc(); 504 505 /// EmitDebugARanges - Emit visible names into a debug aranges section. 506 /// 507 void EmitDebugARanges(); 508 509 /// emitDebugRanges - Emit visible names into a debug ranges section. 510 /// 511 void emitDebugRanges(); 512 513 /// emitDebugMacInfo - Emit visible names into a debug macinfo section. 514 /// 515 void emitDebugMacInfo(); 516 517 /// emitDebugInlineInfo - Emit inline info using following format. 518 /// Section Header: 519 /// 1. length of section 520 /// 2. Dwarf version number 521 /// 3. address size. 522 /// 523 /// Entries (one "entry" for each function that was inlined): 524 /// 525 /// 1. offset into __debug_str section for MIPS linkage name, if exists; 526 /// otherwise offset into __debug_str for regular function name. 527 /// 2. offset into __debug_str section for regular function name. 528 /// 3. an unsigned LEB128 number indicating the number of distinct inlining 529 /// instances for the function. 530 /// 531 /// The rest of the entry consists of a {die_offset, low_pc} pair for each 532 /// inlined instance; the die_offset points to the inlined_subroutine die in 533 /// the __debug_info section, and the low_pc is the starting address for the 534 /// inlining instance. 535 void emitDebugInlineInfo(); 536 537 /// GetOrCreateSourceID - Look up the source id with the given directory and 538 /// source file names. If none currently exists, create a new id and insert it 539 /// in the SourceIds map. This can update DirectoryNames and SourceFileNames 540 /// maps as well. 541 unsigned GetOrCreateSourceID(StringRef DirName, StringRef FileName); 542 543 /// constructCompileUnit - Create new CompileUnit for the given 544 /// metadata node with tag DW_TAG_compile_unit. 545 void constructCompileUnit(const MDNode *N); 546 547 /// getCompielUnit - Get CompileUnit DIE. 548 CompileUnit *getCompileUnit(const MDNode *N) const; 549 550 /// constructGlobalVariableDIE - Construct global variable DIE. 551 void constructGlobalVariableDIE(const MDNode *N); 552 553 /// construct SubprogramDIE - Construct subprogram DIE. 554 void constructSubprogramDIE(const MDNode *N); 555 556 // FIXME: This should go away in favor of complex addresses. 557 /// Find the type the programmer originally declared the variable to be 558 /// and return that type. Obsolete, use GetComplexAddrType instead. 559 /// 560 DIType getBlockByrefType(DIType Ty, std::string Name); 561 562 /// recordSourceLine - Register a source line with debug info. Returns the 563 /// unique label that was emitted and which provides correspondence to 564 /// the source line list. 565 MCSymbol *recordSourceLine(unsigned Line, unsigned Col, const MDNode *Scope); 566 567 /// getSourceLineCount - Return the number of source lines in the debug 568 /// info. 569 unsigned getSourceLineCount() const { 570 return Lines.size(); 571 } 572 573 /// recordVariableFrameIndex - Record a variable's index. 574 void recordVariableFrameIndex(const DbgVariable *V, int Index); 575 576 /// findVariableFrameIndex - Return true if frame index for the variable 577 /// is found. Update FI to hold value of the index. 578 bool findVariableFrameIndex(const DbgVariable *V, int *FI); 579 580 /// findVariableLabel - Find MCSymbol for the variable. 581 const MCSymbol *findVariableLabel(const DbgVariable *V); 582 583 /// findDbgScope - Find DbgScope for the debug loc attached with an 584 /// instruction. 585 DbgScope *findDbgScope(const MachineInstr *MI); 586 587 /// identifyScopeMarkers() - Indentify instructions that are marking 588 /// beginning of or end of a scope. 589 void identifyScopeMarkers(); 590 591 /// extractScopeInformation - Scan machine instructions in this function 592 /// and collect DbgScopes. Return true, if atleast one scope was found. 593 bool extractScopeInformation(); 594 595 /// collectVariableInfo - Populate DbgScope entries with variables' info. 596 void collectVariableInfo(const MachineFunction *); 597 598 /// collectVariableInfoFromMMITable - Collect variable information from 599 /// side table maintained by MMI. 600 void collectVariableInfoFromMMITable(const MachineFunction * MF, 601 SmallPtrSet<const MDNode *, 16> &P); 602public: 603 //===--------------------------------------------------------------------===// 604 // Main entry points. 605 // 606 DwarfDebug(AsmPrinter *A, Module *M); 607 ~DwarfDebug(); 608 609 /// beginModule - Emit all Dwarf sections that should come prior to the 610 /// content. 611 void beginModule(Module *M); 612 613 /// endModule - Emit all Dwarf sections that should come after the content. 614 /// 615 void endModule(); 616 617 /// beginFunction - Gather pre-function debug information. Assumes being 618 /// emitted immediately after the function entry point. 619 void beginFunction(const MachineFunction *MF); 620 621 /// endFunction - Gather and emit post-function debug information. 622 /// 623 void endFunction(const MachineFunction *MF); 624 625 /// getLabelBeforeInsn - Return Label preceding the instruction. 626 const MCSymbol *getLabelBeforeInsn(const MachineInstr *MI); 627 628 /// getLabelAfterInsn - Return Label immediately following the instruction. 629 const MCSymbol *getLabelAfterInsn(const MachineInstr *MI); 630 631 /// beginScope - Process beginning of a scope. 632 void beginScope(const MachineInstr *MI); 633 634 /// endScope - Prcess end of a scope. 635 void endScope(const MachineInstr *MI); 636}; 637} // End of namespace llvm 638 639#endif 640