DwarfDebug.h revision dd38506815a0144a290312e6150b01044fe39a6f
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; 213 214 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 // ProcessedSPNodes - This is a collection of subprogram MDNodes that 223 // are processed to create DIEs. 224 SmallPtrSet<const MDNode *, 16> ProcessedSPNodes; 225 226 /// LabelsBeforeInsn - Maps instruction with label emitted before 227 /// instruction. 228 DenseMap<const MachineInstr *, MCSymbol *> LabelsBeforeInsn; 229 230 /// LabelsAfterInsn - Maps instruction with label emitted after 231 /// instruction. 232 DenseMap<const MachineInstr *, MCSymbol *> LabelsAfterInsn; 233 234 /// insnNeedsLabel - Collection of instructions that need a label to mark 235 /// a debuggging information entity. 236 SmallPtrSet<const MachineInstr *, 8> InsnNeedsLabel; 237 238 SmallVector<const MCSymbol *, 8> DebugRangeSymbols; 239 240 /// Previous instruction's location information. This is used to determine 241 /// label location to indicate scope boundries in dwarf debug info. 242 DebugLoc PrevInstLoc; 243 MCSymbol *PrevLabel; 244 245 struct FunctionDebugFrameInfo { 246 unsigned Number; 247 std::vector<MachineMove> Moves; 248 249 FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M) 250 : Number(Num), Moves(M) {} 251 }; 252 253 std::vector<FunctionDebugFrameInfo> DebugFrames; 254 255 // Section Symbols: these are assembler temporary labels that are emitted at 256 // the beginning of each supported dwarf section. These are used to form 257 // section offsets and are created by EmitSectionLabels. 258 MCSymbol *DwarfFrameSectionSym, *DwarfInfoSectionSym, *DwarfAbbrevSectionSym; 259 MCSymbol *DwarfStrSectionSym, *TextSectionSym, *DwarfDebugRangeSectionSym; 260 MCSymbol *DwarfDebugLocSectionSym; 261 MCSymbol *DwarfDebugLineSectionSym, *CurrentLineSectionSym; 262 MCSymbol *FunctionBeginSym, *FunctionEndSym; 263private: 264 265 /// getSourceDirectoryAndFileIds - Return the directory and file ids that 266 /// maps to the source id. Source id starts at 1. 267 std::pair<unsigned, unsigned> 268 getSourceDirectoryAndFileIds(unsigned SId) const { 269 return SourceIds[SId-1]; 270 } 271 272 /// getNumSourceDirectories - Return the number of source directories in the 273 /// debug info. 274 unsigned getNumSourceDirectories() const { 275 return DirectoryNames.size(); 276 } 277 278 /// getSourceDirectoryName - Return the name of the directory corresponding 279 /// to the id. 280 const std::string &getSourceDirectoryName(unsigned Id) const { 281 return DirectoryNames[Id - 1]; 282 } 283 284 /// getSourceFileName - Return the name of the source file corresponding 285 /// to the id. 286 const std::string &getSourceFileName(unsigned Id) const { 287 return SourceFileNames[Id - 1]; 288 } 289 290 /// getNumSourceIds - Return the number of unique source ids. 291 unsigned getNumSourceIds() const { 292 return SourceIds.size(); 293 } 294 295 /// assignAbbrevNumber - Define a unique number for the abbreviation. 296 /// 297 void assignAbbrevNumber(DIEAbbrev &Abbrev); 298 299 /// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug 300 /// information entry. 301 DIEEntry *createDIEEntry(DIE *Entry); 302 303 /// addUInt - Add an unsigned integer attribute data and value. 304 /// 305 void addUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer); 306 307 /// addSInt - Add an signed integer attribute data and value. 308 /// 309 void addSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer); 310 311 /// addString - Add a string attribute data and value. 312 /// 313 void addString(DIE *Die, unsigned Attribute, unsigned Form, 314 const StringRef Str); 315 316 /// addLabel - Add a Dwarf label attribute data and value. 317 /// 318 void addLabel(DIE *Die, unsigned Attribute, unsigned Form, 319 const MCSymbol *Label); 320 321 /// addDelta - Add a label delta attribute data and value. 322 /// 323 void addDelta(DIE *Die, unsigned Attribute, unsigned Form, 324 const MCSymbol *Hi, const MCSymbol *Lo); 325 326 /// addDIEEntry - Add a DIE attribute data and value. 327 /// 328 void addDIEEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry); 329 330 /// addBlock - Add block data. 331 /// 332 void addBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block); 333 334 /// addSourceLine - Add location information to specified debug information 335 /// entry. 336 void addSourceLine(DIE *Die, const DIVariable *V); 337 void addSourceLine(DIE *Die, const DIGlobalVariable *G); 338 void addSourceLine(DIE *Die, const DISubprogram *SP); 339 void addSourceLine(DIE *Die, const DIType *Ty); 340 void addSourceLine(DIE *Die, const DINameSpace *NS); 341 342 /// addAddress - Add an address attribute to a die based on the location 343 /// provided. 344 void addAddress(DIE *Die, unsigned Attribute, 345 const MachineLocation &Location); 346 347 /// addRegisterAddress - Add register location entry in variable DIE. 348 bool addRegisterAddress(DIE *Die, const MCSymbol *VS, const MachineOperand &MO); 349 350 /// addConstantValue - Add constant value entry in variable DIE. 351 bool addConstantValue(DIE *Die, const MCSymbol *VS, const MachineOperand &MO); 352 353 /// addConstantFPValue - Add constant value entry in variable DIE. 354 bool addConstantFPValue(DIE *Die, const MCSymbol *VS, const MachineOperand &MO); 355 356 /// addComplexAddress - Start with the address based on the location provided, 357 /// and generate the DWARF information necessary to find the actual variable 358 /// (navigating the extra location information encoded in the type) based on 359 /// the starting location. Add the DWARF information to the die. 360 /// 361 void addComplexAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute, 362 const MachineLocation &Location); 363 364 // FIXME: Should be reformulated in terms of addComplexAddress. 365 /// addBlockByrefAddress - Start with the address based on the location 366 /// provided, and generate the DWARF information necessary to find the 367 /// actual Block variable (navigating the Block struct) based on the 368 /// starting location. Add the DWARF information to the die. Obsolete, 369 /// please use addComplexAddress instead. 370 /// 371 void addBlockByrefAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute, 372 const MachineLocation &Location); 373 374 /// addToContextOwner - Add Die into the list of its context owner's children. 375 void addToContextOwner(DIE *Die, DIDescriptor Context); 376 377 /// addType - Add a new type attribute to the specified entity. 378 void addType(DIE *Entity, DIType Ty); 379 380 381 /// getOrCreateNameSpace - Create a DIE for DINameSpace. 382 DIE *getOrCreateNameSpace(DINameSpace NS); 383 384 /// getOrCreateTypeDIE - Find existing DIE or create new DIE for the 385 /// given DIType. 386 DIE *getOrCreateTypeDIE(DIType Ty); 387 388 void addPubTypes(DISubprogram SP); 389 390 /// constructTypeDIE - Construct basic type die from DIBasicType. 391 void constructTypeDIE(DIE &Buffer, 392 DIBasicType BTy); 393 394 /// constructTypeDIE - Construct derived type die from DIDerivedType. 395 void constructTypeDIE(DIE &Buffer, 396 DIDerivedType DTy); 397 398 /// constructTypeDIE - Construct type DIE from DICompositeType. 399 void constructTypeDIE(DIE &Buffer, 400 DICompositeType CTy); 401 402 /// constructSubrangeDIE - Construct subrange DIE from DISubrange. 403 void constructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy); 404 405 /// constructArrayTypeDIE - Construct array type DIE from DICompositeType. 406 void constructArrayTypeDIE(DIE &Buffer, 407 DICompositeType *CTy); 408 409 /// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator. 410 DIE *constructEnumTypeDIE(DIEnumerator ETy); 411 412 /// createGlobalVariableDIE - Create new DIE using GV. 413 DIE *createGlobalVariableDIE(const DIGlobalVariable &GV); 414 415 /// createMemberDIE - Create new member DIE. 416 DIE *createMemberDIE(const DIDerivedType &DT); 417 418 /// createSubprogramDIE - Create new DIE using SP. 419 DIE *createSubprogramDIE(const DISubprogram &SP, bool MakeDecl = false); 420 421 /// getOrCreateDbgScope - Create DbgScope for the scope. 422 DbgScope *getOrCreateDbgScope(const MDNode *Scope, const MDNode *InlinedAt); 423 424 DbgScope *getOrCreateAbstractScope(const MDNode *N); 425 426 /// findAbstractVariable - Find abstract variable associated with Var. 427 DbgVariable *findAbstractVariable(DIVariable &Var, DebugLoc Loc); 428 429 /// updateSubprogramScopeDIE - Find DIE for the given subprogram and 430 /// attach appropriate DW_AT_low_pc and DW_AT_high_pc attributes. 431 /// If there are global variables in this scope then create and insert 432 /// DIEs for these variables. 433 DIE *updateSubprogramScopeDIE(const MDNode *SPNode); 434 435 /// constructLexicalScope - Construct new DW_TAG_lexical_block 436 /// for this scope and attach DW_AT_low_pc/DW_AT_high_pc labels. 437 DIE *constructLexicalScopeDIE(DbgScope *Scope); 438 439 /// constructInlinedScopeDIE - This scope represents inlined body of 440 /// a function. Construct DIE to represent this concrete inlined copy 441 /// of the function. 442 DIE *constructInlinedScopeDIE(DbgScope *Scope); 443 444 /// constructVariableDIE - Construct a DIE for the given DbgVariable. 445 DIE *constructVariableDIE(DbgVariable *DV, DbgScope *S); 446 447 /// constructScopeDIE - Construct a DIE for this scope. 448 DIE *constructScopeDIE(DbgScope *Scope); 449 450 /// EmitSectionLabels - Emit initial Dwarf sections with a label at 451 /// the start of each one. 452 void EmitSectionLabels(); 453 454 /// emitDIE - Recusively Emits a debug information entry. 455 /// 456 void emitDIE(DIE *Die); 457 458 /// computeSizeAndOffset - Compute the size and offset of a DIE. 459 /// 460 unsigned computeSizeAndOffset(DIE *Die, unsigned Offset, bool Last); 461 462 /// computeSizeAndOffsets - Compute the size and offset of all the DIEs. 463 /// 464 void computeSizeAndOffsets(); 465 466 /// EmitDebugInfo - Emit the debug info section. 467 /// 468 void emitDebugInfo(); 469 470 /// emitAbbreviations - Emit the abbreviation section. 471 /// 472 void emitAbbreviations() const; 473 474 /// emitEndOfLineMatrix - Emit the last address of the section and the end of 475 /// the line matrix. 476 /// 477 void emitEndOfLineMatrix(unsigned SectionEnd); 478 479 /// emitDebugLines - Emit source line information. 480 /// 481 void emitDebugLines(); 482 483 /// emitCommonDebugFrame - Emit common frame info into a debug frame section. 484 /// 485 void emitCommonDebugFrame(); 486 487 /// emitFunctionDebugFrame - Emit per function frame info into a debug frame 488 /// section. 489 void emitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo); 490 491 /// emitDebugPubNames - Emit visible names into a debug pubnames section. 492 /// 493 void emitDebugPubNames(); 494 495 /// emitDebugPubTypes - Emit visible types into a debug pubtypes section. 496 /// 497 void emitDebugPubTypes(); 498 499 /// emitDebugStr - Emit visible names into a debug str section. 500 /// 501 void emitDebugStr(); 502 503 /// emitDebugLoc - Emit visible names into a debug loc section. 504 /// 505 void emitDebugLoc(); 506 507 /// EmitDebugARanges - Emit visible names into a debug aranges section. 508 /// 509 void EmitDebugARanges(); 510 511 /// emitDebugRanges - Emit visible names into a debug ranges section. 512 /// 513 void emitDebugRanges(); 514 515 /// emitDebugMacInfo - Emit visible names into a debug macinfo section. 516 /// 517 void emitDebugMacInfo(); 518 519 /// emitDebugInlineInfo - Emit inline info using following format. 520 /// Section Header: 521 /// 1. length of section 522 /// 2. Dwarf version number 523 /// 3. address size. 524 /// 525 /// Entries (one "entry" for each function that was inlined): 526 /// 527 /// 1. offset into __debug_str section for MIPS linkage name, if exists; 528 /// otherwise offset into __debug_str for regular function name. 529 /// 2. offset into __debug_str section for regular function name. 530 /// 3. an unsigned LEB128 number indicating the number of distinct inlining 531 /// instances for the function. 532 /// 533 /// The rest of the entry consists of a {die_offset, low_pc} pair for each 534 /// inlined instance; the die_offset points to the inlined_subroutine die in 535 /// the __debug_info section, and the low_pc is the starting address for the 536 /// inlining instance. 537 void emitDebugInlineInfo(); 538 539 /// GetOrCreateSourceID - Look up the source id with the given directory and 540 /// source file names. If none currently exists, create a new id and insert it 541 /// in the SourceIds map. This can update DirectoryNames and SourceFileNames 542 /// maps as well. 543 unsigned GetOrCreateSourceID(StringRef DirName, StringRef FileName); 544 545 /// constructCompileUnit - Create new CompileUnit for the given 546 /// metadata node with tag DW_TAG_compile_unit. 547 void constructCompileUnit(const MDNode *N); 548 549 /// getCompielUnit - Get CompileUnit DIE. 550 CompileUnit *getCompileUnit(const MDNode *N) const; 551 552 /// constructGlobalVariableDIE - Construct global variable DIE. 553 void constructGlobalVariableDIE(const MDNode *N); 554 555 /// construct SubprogramDIE - Construct subprogram DIE. 556 void constructSubprogramDIE(const MDNode *N); 557 558 // FIXME: This should go away in favor of complex addresses. 559 /// Find the type the programmer originally declared the variable to be 560 /// and return that type. Obsolete, use GetComplexAddrType instead. 561 /// 562 DIType getBlockByrefType(DIType Ty, std::string Name); 563 564 /// recordSourceLine - Register a source line with debug info. Returns the 565 /// unique label that was emitted and which provides correspondence to 566 /// the source line list. 567 MCSymbol *recordSourceLine(unsigned Line, unsigned Col, const MDNode *Scope); 568 569 /// getSourceLineCount - Return the number of source lines in the debug 570 /// info. 571 unsigned getSourceLineCount() const { 572 return Lines.size(); 573 } 574 575 /// recordVariableFrameIndex - Record a variable's index. 576 void recordVariableFrameIndex(const DbgVariable *V, int Index); 577 578 /// findVariableFrameIndex - Return true if frame index for the variable 579 /// is found. Update FI to hold value of the index. 580 bool findVariableFrameIndex(const DbgVariable *V, int *FI); 581 582 /// findVariableLabel - Find MCSymbol for the variable. 583 const MCSymbol *findVariableLabel(const DbgVariable *V); 584 585 /// findDbgScope - Find DbgScope for the debug loc attached with an 586 /// instruction. 587 DbgScope *findDbgScope(const MachineInstr *MI); 588 589 /// identifyScopeMarkers() - Indentify instructions that are marking 590 /// beginning of or end of a scope. 591 void identifyScopeMarkers(); 592 593 /// extractScopeInformation - Scan machine instructions in this function 594 /// and collect DbgScopes. Return true, if atleast one scope was found. 595 bool extractScopeInformation(); 596 597 /// collectVariableInfo - Populate DbgScope entries with variables' info. 598 void collectVariableInfo(const MachineFunction *, 599 SmallPtrSet<const MDNode *, 16> &ProcessedVars); 600 601 /// collectVariableInfoFromMMITable - Collect variable information from 602 /// side table maintained by MMI. 603 void collectVariableInfoFromMMITable(const MachineFunction * MF, 604 SmallPtrSet<const MDNode *, 16> &P); 605public: 606 //===--------------------------------------------------------------------===// 607 // Main entry points. 608 // 609 DwarfDebug(AsmPrinter *A, Module *M); 610 ~DwarfDebug(); 611 612 /// beginModule - Emit all Dwarf sections that should come prior to the 613 /// content. 614 void beginModule(Module *M); 615 616 /// endModule - Emit all Dwarf sections that should come after the content. 617 /// 618 void endModule(); 619 620 /// beginFunction - Gather pre-function debug information. Assumes being 621 /// emitted immediately after the function entry point. 622 void beginFunction(const MachineFunction *MF); 623 624 /// endFunction - Gather and emit post-function debug information. 625 /// 626 void endFunction(const MachineFunction *MF); 627 628 /// getLabelBeforeInsn - Return Label preceding the instruction. 629 const MCSymbol *getLabelBeforeInsn(const MachineInstr *MI); 630 631 /// getLabelAfterInsn - Return Label immediately following the instruction. 632 const MCSymbol *getLabelAfterInsn(const MachineInstr *MI); 633 634 /// beginScope - Process beginning of a scope. 635 void beginScope(const MachineInstr *MI); 636 637 /// endScope - Prcess end of a scope. 638 void endScope(const MachineInstr *MI); 639}; 640} // End of namespace llvm 641 642#endif 643