DwarfDebug.h revision b21a758bc232fcecdaca4fbc05334bb5b79cdad1
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 SmallVector<const MCSymbol *, 8> DebugRangeSymbols; 231 232 /// Previous instruction's location information. This is used to determine 233 /// label location to indicate scope boundries in dwarf debug info. 234 DebugLoc PrevInstLoc; 235 MCSymbol *PrevLabel; 236 237 struct FunctionDebugFrameInfo { 238 unsigned Number; 239 std::vector<MachineMove> Moves; 240 241 FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M) 242 : Number(Num), Moves(M) {} 243 }; 244 245 std::vector<FunctionDebugFrameInfo> DebugFrames; 246 247 // Section Symbols: these are assembler temporary labels that are emitted at 248 // the beginning of each supported dwarf section. These are used to form 249 // section offsets and are created by EmitSectionLabels. 250 MCSymbol *DwarfFrameSectionSym, *DwarfInfoSectionSym, *DwarfAbbrevSectionSym; 251 MCSymbol *DwarfStrSectionSym, *TextSectionSym, *DwarfDebugRangeSectionSym; 252 MCSymbol *DwarfDebugLocSectionSym; 253 MCSymbol *FunctionBeginSym, *FunctionEndSym; 254private: 255 256 /// getSourceDirectoryAndFileIds - Return the directory and file ids that 257 /// maps to the source id. Source id starts at 1. 258 std::pair<unsigned, unsigned> 259 getSourceDirectoryAndFileIds(unsigned SId) const { 260 return SourceIds[SId-1]; 261 } 262 263 /// getNumSourceDirectories - Return the number of source directories in the 264 /// debug info. 265 unsigned getNumSourceDirectories() const { 266 return DirectoryNames.size(); 267 } 268 269 /// getSourceDirectoryName - Return the name of the directory corresponding 270 /// to the id. 271 const std::string &getSourceDirectoryName(unsigned Id) const { 272 return DirectoryNames[Id - 1]; 273 } 274 275 /// getSourceFileName - Return the name of the source file corresponding 276 /// to the id. 277 const std::string &getSourceFileName(unsigned Id) const { 278 return SourceFileNames[Id - 1]; 279 } 280 281 /// getNumSourceIds - Return the number of unique source ids. 282 unsigned getNumSourceIds() const { 283 return SourceIds.size(); 284 } 285 286 /// assignAbbrevNumber - Define a unique number for the abbreviation. 287 /// 288 void assignAbbrevNumber(DIEAbbrev &Abbrev); 289 290 /// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug 291 /// information entry. 292 DIEEntry *createDIEEntry(DIE *Entry); 293 294 /// addUInt - Add an unsigned integer attribute data and value. 295 /// 296 void addUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer); 297 298 /// addSInt - Add an signed integer attribute data and value. 299 /// 300 void addSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer); 301 302 /// addString - Add a string attribute data and value. 303 /// 304 void addString(DIE *Die, unsigned Attribute, unsigned Form, 305 const StringRef Str); 306 307 /// addLabel - Add a Dwarf label attribute data and value. 308 /// 309 void addLabel(DIE *Die, unsigned Attribute, unsigned Form, 310 const MCSymbol *Label); 311 312 /// addDelta - Add a label delta attribute data and value. 313 /// 314 void addDelta(DIE *Die, unsigned Attribute, unsigned Form, 315 const MCSymbol *Hi, const MCSymbol *Lo); 316 317 /// addDIEEntry - Add a DIE attribute data and value. 318 /// 319 void addDIEEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry); 320 321 /// addBlock - Add block data. 322 /// 323 void addBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block); 324 325 /// addSourceLine - Add location information to specified debug information 326 /// entry. 327 void addSourceLine(DIE *Die, const DIVariable *V); 328 void addSourceLine(DIE *Die, const DIGlobalVariable *G); 329 void addSourceLine(DIE *Die, const DISubprogram *SP); 330 void addSourceLine(DIE *Die, const DIType *Ty); 331 void addSourceLine(DIE *Die, const DINameSpace *NS); 332 333 /// addAddress - Add an address attribute to a die based on the location 334 /// provided. 335 void addAddress(DIE *Die, unsigned Attribute, 336 const MachineLocation &Location); 337 338 /// addRegisterAddress - Add register location entry in variable DIE. 339 bool addRegisterAddress(DIE *Die, const MCSymbol *VS, const MachineOperand &MO); 340 341 /// addConstantValue - Add constant value entry in variable DIE. 342 bool addConstantValue(DIE *Die, const MCSymbol *VS, const MachineOperand &MO); 343 344 /// addConstantFPValue - Add constant value entry in variable DIE. 345 bool addConstantFPValue(DIE *Die, const MCSymbol *VS, const MachineOperand &MO); 346 347 /// addComplexAddress - Start with the address based on the location provided, 348 /// and generate the DWARF information necessary to find the actual variable 349 /// (navigating the extra location information encoded in the type) based on 350 /// the starting location. Add the DWARF information to the die. 351 /// 352 void addComplexAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute, 353 const MachineLocation &Location); 354 355 // FIXME: Should be reformulated in terms of addComplexAddress. 356 /// addBlockByrefAddress - Start with the address based on the location 357 /// provided, and generate the DWARF information necessary to find the 358 /// actual Block variable (navigating the Block struct) based on the 359 /// starting location. Add the DWARF information to the die. Obsolete, 360 /// please use addComplexAddress instead. 361 /// 362 void addBlockByrefAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute, 363 const MachineLocation &Location); 364 365 /// addToContextOwner - Add Die into the list of its context owner's children. 366 void addToContextOwner(DIE *Die, DIDescriptor Context); 367 368 /// addType - Add a new type attribute to the specified entity. 369 void addType(DIE *Entity, DIType Ty); 370 371 372 /// getOrCreateNameSpace - Create a DIE for DINameSpace. 373 DIE *getOrCreateNameSpace(DINameSpace NS); 374 375 /// getOrCreateTypeDIE - Find existing DIE or create new DIE for the 376 /// given DIType. 377 DIE *getOrCreateTypeDIE(DIType Ty); 378 379 void addPubTypes(DISubprogram SP); 380 381 /// constructTypeDIE - Construct basic type die from DIBasicType. 382 void constructTypeDIE(DIE &Buffer, 383 DIBasicType BTy); 384 385 /// constructTypeDIE - Construct derived type die from DIDerivedType. 386 void constructTypeDIE(DIE &Buffer, 387 DIDerivedType DTy); 388 389 /// constructTypeDIE - Construct type DIE from DICompositeType. 390 void constructTypeDIE(DIE &Buffer, 391 DICompositeType CTy); 392 393 /// constructSubrangeDIE - Construct subrange DIE from DISubrange. 394 void constructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy); 395 396 /// constructArrayTypeDIE - Construct array type DIE from DICompositeType. 397 void constructArrayTypeDIE(DIE &Buffer, 398 DICompositeType *CTy); 399 400 /// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator. 401 DIE *constructEnumTypeDIE(DIEnumerator ETy); 402 403 /// createGlobalVariableDIE - Create new DIE using GV. 404 DIE *createGlobalVariableDIE(const DIGlobalVariable &GV); 405 406 /// createMemberDIE - Create new member DIE. 407 DIE *createMemberDIE(const DIDerivedType &DT); 408 409 /// createSubprogramDIE - Create new DIE using SP. 410 DIE *createSubprogramDIE(const DISubprogram &SP, bool MakeDecl = false); 411 412 /// getOrCreateDbgScope - Create DbgScope for the scope. 413 DbgScope *getOrCreateDbgScope(const MDNode *Scope, const MDNode *InlinedAt); 414 415 DbgScope *getOrCreateAbstractScope(const MDNode *N); 416 417 /// findAbstractVariable - Find abstract variable associated with Var. 418 DbgVariable *findAbstractVariable(DIVariable &Var, DebugLoc Loc); 419 420 /// updateSubprogramScopeDIE - Find DIE for the given subprogram and 421 /// attach appropriate DW_AT_low_pc and DW_AT_high_pc attributes. 422 /// If there are global variables in this scope then create and insert 423 /// DIEs for these variables. 424 DIE *updateSubprogramScopeDIE(const MDNode *SPNode); 425 426 /// constructLexicalScope - Construct new DW_TAG_lexical_block 427 /// for this scope and attach DW_AT_low_pc/DW_AT_high_pc labels. 428 DIE *constructLexicalScopeDIE(DbgScope *Scope); 429 430 /// constructInlinedScopeDIE - This scope represents inlined body of 431 /// a function. Construct DIE to represent this concrete inlined copy 432 /// of the function. 433 DIE *constructInlinedScopeDIE(DbgScope *Scope); 434 435 /// constructVariableDIE - Construct a DIE for the given DbgVariable. 436 DIE *constructVariableDIE(DbgVariable *DV, DbgScope *S); 437 438 /// constructScopeDIE - Construct a DIE for this scope. 439 DIE *constructScopeDIE(DbgScope *Scope); 440 441 /// EmitSectionLabels - Emit initial Dwarf sections with a label at 442 /// the start of each one. 443 void EmitSectionLabels(); 444 445 /// emitDIE - Recusively Emits a debug information entry. 446 /// 447 void emitDIE(DIE *Die); 448 449 /// computeSizeAndOffset - Compute the size and offset of a DIE. 450 /// 451 unsigned computeSizeAndOffset(DIE *Die, unsigned Offset, bool Last); 452 453 /// computeSizeAndOffsets - Compute the size and offset of all the DIEs. 454 /// 455 void computeSizeAndOffsets(); 456 457 /// EmitDebugInfo - Emit the debug info section. 458 /// 459 void emitDebugInfo(); 460 461 /// emitAbbreviations - Emit the abbreviation section. 462 /// 463 void emitAbbreviations() const; 464 465 /// emitEndOfLineMatrix - Emit the last address of the section and the end of 466 /// the line matrix. 467 /// 468 void emitEndOfLineMatrix(unsigned SectionEnd); 469 470 /// emitDebugLines - Emit source line information. 471 /// 472 void emitDebugLines(); 473 474 /// emitCommonDebugFrame - Emit common frame info into a debug frame section. 475 /// 476 void emitCommonDebugFrame(); 477 478 /// emitFunctionDebugFrame - Emit per function frame info into a debug frame 479 /// section. 480 void emitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo); 481 482 /// emitDebugPubNames - Emit visible names into a debug pubnames section. 483 /// 484 void emitDebugPubNames(); 485 486 /// emitDebugPubTypes - Emit visible types into a debug pubtypes section. 487 /// 488 void emitDebugPubTypes(); 489 490 /// emitDebugStr - Emit visible names into a debug str section. 491 /// 492 void emitDebugStr(); 493 494 /// emitDebugLoc - Emit visible names into a debug loc section. 495 /// 496 void emitDebugLoc(); 497 498 /// EmitDebugARanges - Emit visible names into a debug aranges section. 499 /// 500 void EmitDebugARanges(); 501 502 /// emitDebugRanges - Emit visible names into a debug ranges section. 503 /// 504 void emitDebugRanges(); 505 506 /// emitDebugMacInfo - Emit visible names into a debug macinfo section. 507 /// 508 void emitDebugMacInfo(); 509 510 /// emitDebugInlineInfo - Emit inline info using following format. 511 /// Section Header: 512 /// 1. length of section 513 /// 2. Dwarf version number 514 /// 3. address size. 515 /// 516 /// Entries (one "entry" for each function that was inlined): 517 /// 518 /// 1. offset into __debug_str section for MIPS linkage name, if exists; 519 /// otherwise offset into __debug_str for regular function name. 520 /// 2. offset into __debug_str section for regular function name. 521 /// 3. an unsigned LEB128 number indicating the number of distinct inlining 522 /// instances for the function. 523 /// 524 /// The rest of the entry consists of a {die_offset, low_pc} pair for each 525 /// inlined instance; the die_offset points to the inlined_subroutine die in 526 /// the __debug_info section, and the low_pc is the starting address for the 527 /// inlining instance. 528 void emitDebugInlineInfo(); 529 530 /// GetOrCreateSourceID - Look up the source id with the given directory and 531 /// source file names. If none currently exists, create a new id and insert it 532 /// in the SourceIds map. This can update DirectoryNames and SourceFileNames 533 /// maps as well. 534 unsigned GetOrCreateSourceID(StringRef DirName, StringRef FileName); 535 536 /// constructCompileUnit - Create new CompileUnit for the given 537 /// metadata node with tag DW_TAG_compile_unit. 538 void constructCompileUnit(const MDNode *N); 539 540 /// getCompielUnit - Get CompileUnit DIE. 541 CompileUnit *getCompileUnit(const MDNode *N) const; 542 543 /// constructGlobalVariableDIE - Construct global variable DIE. 544 void constructGlobalVariableDIE(const MDNode *N); 545 546 /// construct SubprogramDIE - Construct subprogram DIE. 547 void constructSubprogramDIE(const MDNode *N); 548 549 // FIXME: This should go away in favor of complex addresses. 550 /// Find the type the programmer originally declared the variable to be 551 /// and return that type. Obsolete, use GetComplexAddrType instead. 552 /// 553 DIType getBlockByrefType(DIType Ty, std::string Name); 554 555 /// recordSourceLine - Register a source line with debug info. Returns the 556 /// unique label that was emitted and which provides correspondence to 557 /// the source line list. 558 MCSymbol *recordSourceLine(unsigned Line, unsigned Col, const MDNode *Scope); 559 560 /// getSourceLineCount - Return the number of source lines in the debug 561 /// info. 562 unsigned getSourceLineCount() const { 563 return Lines.size(); 564 } 565 566 /// recordVariableFrameIndex - Record a variable's index. 567 void recordVariableFrameIndex(const DbgVariable *V, int Index); 568 569 /// findVariableFrameIndex - Return true if frame index for the variable 570 /// is found. Update FI to hold value of the index. 571 bool findVariableFrameIndex(const DbgVariable *V, int *FI); 572 573 /// findVariableLabel - Find MCSymbol for the variable. 574 const MCSymbol *findVariableLabel(const DbgVariable *V); 575 576 /// findDbgScope - Find DbgScope for the debug loc attached with an 577 /// instruction. 578 DbgScope *findDbgScope(const MachineInstr *MI); 579 580 /// identifyScopeMarkers() - Indentify instructions that are marking 581 /// beginning of or end of a scope. 582 void identifyScopeMarkers(); 583 584 /// extractScopeInformation - Scan machine instructions in this function 585 /// and collect DbgScopes. Return true, if atleast one scope was found. 586 bool extractScopeInformation(); 587 588 /// collectVariableInfo - Populate DbgScope entries with variables' info. 589 void collectVariableInfo(const MachineFunction *); 590 591 /// collectVariableInfoFromMMITable - Collect variable information from 592 /// side table maintained by MMI. 593 void collectVariableInfoFromMMITable(const MachineFunction * MF, 594 SmallPtrSet<const MDNode *, 16> &P); 595public: 596 //===--------------------------------------------------------------------===// 597 // Main entry points. 598 // 599 DwarfDebug(AsmPrinter *A, Module *M); 600 ~DwarfDebug(); 601 602 /// beginModule - Emit all Dwarf sections that should come prior to the 603 /// content. 604 void beginModule(Module *M); 605 606 /// endModule - Emit all Dwarf sections that should come after the content. 607 /// 608 void endModule(); 609 610 /// beginFunction - Gather pre-function debug information. Assumes being 611 /// emitted immediately after the function entry point. 612 void beginFunction(const MachineFunction *MF); 613 614 /// endFunction - Gather and emit post-function debug information. 615 /// 616 void endFunction(const MachineFunction *MF); 617 618 /// getLabelBeforeInsn - Return Label preceding the instruction. 619 const MCSymbol *getLabelBeforeInsn(const MachineInstr *MI); 620 621 /// getLabelAfterInsn - Return Label immediately following the instruction. 622 const MCSymbol *getLabelAfterInsn(const MachineInstr *MI); 623 624 /// beginScope - Process beginning of a scope. 625 void beginScope(const MachineInstr *MI); 626 627 /// endScope - Prcess end of a scope. 628 void endScope(const MachineInstr *MI); 629}; 630} // End of namespace llvm 631 632#endif 633