forked from OSchip/llvm-project
572 lines
20 KiB
C++
572 lines
20 KiB
C++
//===-- llvm/CodeGen/DwarfDebug.h - Dwarf Debug Framework ------*- C++ -*--===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains support for writing dwarf debug info into asm files.
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//
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//===----------------------------------------------------------------------===//
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#ifndef CODEGEN_ASMPRINTER_DWARFDEBUG_H__
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#define CODEGEN_ASMPRINTER_DWARFDEBUG_H__
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#include "DIE.h"
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#include "DwarfPrinter.h"
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#include "llvm/CodeGen/AsmPrinter.h"
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#include "llvm/CodeGen/MachineLocation.h"
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#include "llvm/Analysis/DebugInfo.h"
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#include "llvm/Support/Allocator.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/ADT/DenseMap.h"
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#include "llvm/ADT/FoldingSet.h"
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#include "llvm/ADT/SmallSet.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/UniqueVector.h"
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#include <string>
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namespace llvm {
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class CompileUnit;
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class DbgConcreteScope;
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class DbgScope;
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class DbgVariable;
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class MachineFrameInfo;
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class MachineModuleInfo;
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class MCAsmInfo;
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class Timer;
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//===----------------------------------------------------------------------===//
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/// SrcLineInfo - This class is used to record source line correspondence.
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///
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class SrcLineInfo {
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unsigned Line; // Source line number.
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unsigned Column; // Source column.
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unsigned SourceID; // Source ID number.
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MCSymbol *Label; // Label in code ID number.
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public:
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SrcLineInfo(unsigned L, unsigned C, unsigned S, MCSymbol *label)
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: Line(L), Column(C), SourceID(S), Label(label) {}
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// Accessors
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unsigned getLine() const { return Line; }
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unsigned getColumn() const { return Column; }
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unsigned getSourceID() const { return SourceID; }
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MCSymbol *getLabel() const { return Label; }
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};
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class DwarfDebug : public DwarfPrinter {
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//===--------------------------------------------------------------------===//
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// Attributes used to construct specific Dwarf sections.
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//
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/// ModuleCU - All DIEs are inserted in ModuleCU.
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CompileUnit *ModuleCU;
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/// AbbreviationsSet - Used to uniquely define abbreviations.
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///
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FoldingSet<DIEAbbrev> AbbreviationsSet;
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/// Abbreviations - A list of all the unique abbreviations in use.
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///
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std::vector<DIEAbbrev *> Abbreviations;
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/// DirectoryIdMap - Directory name to directory id map.
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///
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StringMap<unsigned> DirectoryIdMap;
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/// DirectoryNames - A list of directory names.
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SmallVector<std::string, 8> DirectoryNames;
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/// SourceFileIdMap - Source file name to source file id map.
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///
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StringMap<unsigned> SourceFileIdMap;
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/// SourceFileNames - A list of source file names.
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SmallVector<std::string, 8> SourceFileNames;
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/// SourceIdMap - Source id map, i.e. pair of directory id and source file
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/// id mapped to a unique id.
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DenseMap<std::pair<unsigned, unsigned>, unsigned> SourceIdMap;
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/// SourceIds - Reverse map from source id to directory id + file id pair.
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///
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SmallVector<std::pair<unsigned, unsigned>, 8> SourceIds;
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/// Lines - List of source line correspondence.
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std::vector<SrcLineInfo> Lines;
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/// DIEBlocks - A list of all the DIEBlocks in use.
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std::vector<DIEBlock *> DIEBlocks;
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// DIEValueAllocator - All DIEValues are allocated through this allocator.
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BumpPtrAllocator DIEValueAllocator;
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/// StringPool - A String->Symbol mapping of strings used by indirect
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/// references.
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StringMap<std::pair<MCSymbol*, unsigned> > StringPool;
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unsigned NextStringPoolNumber;
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MCSymbol *getStringPoolEntry(StringRef Str);
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/// SectionMap - Provides a unique id per text section.
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///
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UniqueVector<const MCSection*> SectionMap;
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/// SectionSourceLines - Tracks line numbers per text section.
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///
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std::vector<std::vector<SrcLineInfo> > SectionSourceLines;
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/// shouldEmit - Flag to indicate if debug information should be emitted.
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///
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bool shouldEmit;
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// CurrentFnDbgScope - Top level scope for the current function.
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//
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DbgScope *CurrentFnDbgScope;
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/// DbgScopeMap - Tracks the scopes in the current function. Owns the
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/// contained DbgScope*s.
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///
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DenseMap<MDNode *, DbgScope *> DbgScopeMap;
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/// ConcreteScopes - Tracks the concrete scopees in the current function.
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/// These scopes are also included in DbgScopeMap.
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DenseMap<MDNode *, DbgScope *> ConcreteScopes;
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/// AbstractScopes - Tracks the abstract scopes a module. These scopes are
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/// not included DbgScopeMap. AbstractScopes owns its DbgScope*s.
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DenseMap<MDNode *, DbgScope *> AbstractScopes;
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/// AbstractScopesList - Tracks abstract scopes constructed while processing
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/// a function. This list is cleared during endFunction().
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SmallVector<DbgScope *, 4>AbstractScopesList;
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/// AbstractVariables - Collection on abstract variables. Owned by the
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/// DbgScopes in AbstractScopes.
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DenseMap<MDNode *, DbgVariable *> AbstractVariables;
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/// DbgValueStartMap - Tracks starting scope of variable DIEs.
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/// If the scope of an object begins sometime after the low pc value for the
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/// scope most closely enclosing the object, the object entry may have a
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/// DW_AT_start_scope attribute.
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DenseMap<const MachineInstr *, DbgVariable *> DbgValueStartMap;
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/// InliendSubprogramDIEs - Collection of subprgram DIEs that are marked
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/// (at the end of the module) as DW_AT_inline.
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SmallPtrSet<DIE *, 4> InlinedSubprogramDIEs;
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DenseMap<DIE *, MDNode *> ContainingTypeMap;
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/// AbstractSubprogramDIEs - Collection of abstruct subprogram DIEs.
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SmallPtrSet<DIE *, 4> AbstractSubprogramDIEs;
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/// TopLevelDIEs - Collection of top level DIEs.
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SmallPtrSet<DIE *, 4> TopLevelDIEs;
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SmallVector<DIE *, 4> TopLevelDIEsVector;
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typedef SmallVector<DbgScope *, 2> ScopeVector;
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typedef DenseMap<const MachineInstr *, ScopeVector>
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InsnToDbgScopeMapTy;
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/// DbgScopeBeginMap - Maps instruction with a list of DbgScopes it starts.
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InsnToDbgScopeMapTy DbgScopeBeginMap;
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/// DbgScopeEndMap - Maps instruction with a list DbgScopes it ends.
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InsnToDbgScopeMapTy DbgScopeEndMap;
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/// InlineInfo - Keep track of inlined functions and their location. This
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/// information is used to populate debug_inlined section.
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typedef std::pair<MCSymbol*, DIE *> InlineInfoLabels;
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DenseMap<MDNode*, SmallVector<InlineInfoLabels, 4> > InlineInfo;
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SmallVector<MDNode *, 4> InlinedSPNodes;
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/// CompileUnitOffsets - A vector of the offsets of the compile units. This is
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/// used when calculating the "origin" of a concrete instance of an inlined
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/// function.
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DenseMap<CompileUnit *, unsigned> CompileUnitOffsets;
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/// Previous instruction's location information. This is used to determine
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/// label location to indicate scope boundries in dwarf debug info.
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DebugLoc PrevInstLoc;
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/// DebugTimer - Timer for the Dwarf debug writer.
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Timer *DebugTimer;
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struct FunctionDebugFrameInfo {
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unsigned Number;
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std::vector<MachineMove> Moves;
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FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M)
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: Number(Num), Moves(M) {}
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};
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std::vector<FunctionDebugFrameInfo> DebugFrames;
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// Section Symbols: these are assembler temporary labels that are emitted at
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// the beginning of each supported dwarf section. These are used to form
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// section offsets and are created by EmitSectionLabels.
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MCSymbol *DwarfFrameSectionSym, *DwarfInfoSectionSym, *DwarfAbbrevSectionSym;
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MCSymbol *DwarfStrSectionSym, *TextSectionSym;
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private:
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/// getSourceDirectoryAndFileIds - Return the directory and file ids that
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/// maps to the source id. Source id starts at 1.
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std::pair<unsigned, unsigned>
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getSourceDirectoryAndFileIds(unsigned SId) const {
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return SourceIds[SId-1];
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}
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/// getNumSourceDirectories - Return the number of source directories in the
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/// debug info.
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unsigned getNumSourceDirectories() const {
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return DirectoryNames.size();
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}
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/// getSourceDirectoryName - Return the name of the directory corresponding
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/// to the id.
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const std::string &getSourceDirectoryName(unsigned Id) const {
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return DirectoryNames[Id - 1];
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}
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/// getSourceFileName - Return the name of the source file corresponding
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/// to the id.
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const std::string &getSourceFileName(unsigned Id) const {
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return SourceFileNames[Id - 1];
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}
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/// getNumSourceIds - Return the number of unique source ids.
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unsigned getNumSourceIds() const {
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return SourceIds.size();
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}
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/// assignAbbrevNumber - Define a unique number for the abbreviation.
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///
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void assignAbbrevNumber(DIEAbbrev &Abbrev);
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/// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug
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/// information entry.
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DIEEntry *createDIEEntry(DIE *Entry);
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/// addUInt - Add an unsigned integer attribute data and value.
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///
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void addUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer);
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/// addSInt - Add an signed integer attribute data and value.
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///
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void addSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer);
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/// addString - Add a string attribute data and value.
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///
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void addString(DIE *Die, unsigned Attribute, unsigned Form,
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const StringRef Str);
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/// addLabel - Add a Dwarf label attribute data and value.
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///
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void addLabel(DIE *Die, unsigned Attribute, unsigned Form,
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const MCSymbol *Label);
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/// addDelta - Add a label delta attribute data and value.
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///
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void addDelta(DIE *Die, unsigned Attribute, unsigned Form,
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const MCSymbol *Hi, const MCSymbol *Lo);
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/// addDIEEntry - Add a DIE attribute data and value.
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///
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void addDIEEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry) {
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Die->addValue(Attribute, Form, createDIEEntry(Entry));
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}
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/// addBlock - Add block data.
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///
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void addBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block);
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/// addSourceLine - Add location information to specified debug information
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/// entry.
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void addSourceLine(DIE *Die, const DIVariable *V);
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void addSourceLine(DIE *Die, const DIGlobal *G);
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void addSourceLine(DIE *Die, const DISubprogram *SP);
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void addSourceLine(DIE *Die, const DIType *Ty);
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void addSourceLine(DIE *Die, const DINameSpace *NS);
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/// addAddress - Add an address attribute to a die based on the location
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/// provided.
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void addAddress(DIE *Die, unsigned Attribute,
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const MachineLocation &Location);
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/// addComplexAddress - Start with the address based on the location provided,
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/// and generate the DWARF information necessary to find the actual variable
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/// (navigating the extra location information encoded in the type) based on
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/// the starting location. Add the DWARF information to the die.
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///
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void addComplexAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute,
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const MachineLocation &Location);
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// FIXME: Should be reformulated in terms of addComplexAddress.
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/// addBlockByrefAddress - Start with the address based on the location
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/// provided, and generate the DWARF information necessary to find the
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/// actual Block variable (navigating the Block struct) based on the
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/// starting location. Add the DWARF information to the die. Obsolete,
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/// please use addComplexAddress instead.
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///
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void addBlockByrefAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute,
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const MachineLocation &Location);
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/// addToContextOwner - Add Die into the list of its context owner's children.
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void addToContextOwner(DIE *Die, DIDescriptor Context);
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/// addType - Add a new type attribute to the specified entity.
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void addType(DIE *Entity, DIType Ty);
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/// getOrCreateNameSpace - Create a DIE for DINameSpace.
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DIE *getOrCreateNameSpace(DINameSpace NS);
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/// getOrCreateTypeDIE - Find existing DIE or create new DIE for the
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/// given DIType.
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DIE *getOrCreateTypeDIE(DIType Ty);
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void addPubTypes(DISubprogram SP);
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/// constructTypeDIE - Construct basic type die from DIBasicType.
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void constructTypeDIE(DIE &Buffer,
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DIBasicType BTy);
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/// constructTypeDIE - Construct derived type die from DIDerivedType.
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void constructTypeDIE(DIE &Buffer,
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DIDerivedType DTy);
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/// constructTypeDIE - Construct type DIE from DICompositeType.
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void constructTypeDIE(DIE &Buffer,
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DICompositeType CTy);
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/// constructSubrangeDIE - Construct subrange DIE from DISubrange.
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void constructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy);
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/// constructArrayTypeDIE - Construct array type DIE from DICompositeType.
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void constructArrayTypeDIE(DIE &Buffer,
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DICompositeType *CTy);
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/// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
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DIE *constructEnumTypeDIE(DIEnumerator ETy);
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/// createGlobalVariableDIE - Create new DIE using GV.
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DIE *createGlobalVariableDIE(const DIGlobalVariable &GV);
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/// createMemberDIE - Create new member DIE.
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DIE *createMemberDIE(const DIDerivedType &DT);
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/// createSubprogramDIE - Create new DIE using SP.
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DIE *createSubprogramDIE(const DISubprogram &SP, bool MakeDecl = false);
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/// getUpdatedDbgScope - Find or create DbgScope assicated with
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/// the instruction. Initialize scope and update scope hierarchy.
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DbgScope *getUpdatedDbgScope(MDNode *N, const MachineInstr *MI,
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MDNode *InlinedAt);
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/// createDbgScope - Create DbgScope for the scope.
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void createDbgScope(MDNode *Scope, MDNode *InlinedAt);
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DbgScope *getOrCreateAbstractScope(MDNode *N);
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/// findAbstractVariable - Find abstract variable associated with Var.
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DbgVariable *findAbstractVariable(DIVariable &Var, unsigned FrameIdx,
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DebugLoc Loc);
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DbgVariable *findAbstractVariable(DIVariable &Var, const MachineInstr *MI,
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DebugLoc Loc);
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/// updateSubprogramScopeDIE - Find DIE for the given subprogram and
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/// attach appropriate DW_AT_low_pc and DW_AT_high_pc attributes.
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/// If there are global variables in this scope then create and insert
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/// DIEs for these variables.
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DIE *updateSubprogramScopeDIE(MDNode *SPNode);
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/// constructLexicalScope - Construct new DW_TAG_lexical_block
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/// for this scope and attach DW_AT_low_pc/DW_AT_high_pc labels.
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DIE *constructLexicalScopeDIE(DbgScope *Scope);
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/// constructInlinedScopeDIE - This scope represents inlined body of
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/// a function. Construct DIE to represent this concrete inlined copy
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/// of the function.
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DIE *constructInlinedScopeDIE(DbgScope *Scope);
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/// constructVariableDIE - Construct a DIE for the given DbgVariable.
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DIE *constructVariableDIE(DbgVariable *DV, DbgScope *S);
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/// constructScopeDIE - Construct a DIE for this scope.
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DIE *constructScopeDIE(DbgScope *Scope);
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/// EmitSectionLabels - Emit initial Dwarf sections with a label at
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/// the start of each one.
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void EmitSectionLabels();
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/// emitDIE - Recusively Emits a debug information entry.
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///
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void emitDIE(DIE *Die);
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/// computeSizeAndOffset - Compute the size and offset of a DIE.
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///
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unsigned computeSizeAndOffset(DIE *Die, unsigned Offset, bool Last);
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/// computeSizeAndOffsets - Compute the size and offset of all the DIEs.
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///
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void computeSizeAndOffsets();
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/// EmitDebugInfo - Emit the debug info section.
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///
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void emitDebugInfo();
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/// emitAbbreviations - Emit the abbreviation section.
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///
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void emitAbbreviations() const;
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/// emitEndOfLineMatrix - Emit the last address of the section and the end of
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/// the line matrix.
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///
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void emitEndOfLineMatrix(unsigned SectionEnd);
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/// emitDebugLines - Emit source line information.
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///
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void emitDebugLines();
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/// emitCommonDebugFrame - Emit common frame info into a debug frame section.
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///
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void emitCommonDebugFrame();
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/// emitFunctionDebugFrame - Emit per function frame info into a debug frame
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/// section.
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void emitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo);
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/// emitDebugPubNames - Emit visible names into a debug pubnames section.
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///
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void emitDebugPubNames();
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/// emitDebugPubTypes - Emit visible types into a debug pubtypes section.
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///
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void emitDebugPubTypes();
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/// emitDebugStr - Emit visible names into a debug str section.
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///
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void emitDebugStr();
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/// emitDebugLoc - Emit visible names into a debug loc section.
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///
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void emitDebugLoc();
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/// EmitDebugARanges - Emit visible names into a debug aranges section.
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///
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void EmitDebugARanges();
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/// emitDebugRanges - Emit visible names into a debug ranges section.
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///
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void emitDebugRanges();
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/// emitDebugMacInfo - Emit visible names into a debug macinfo section.
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///
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void emitDebugMacInfo();
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/// emitDebugInlineInfo - Emit inline info using following format.
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/// Section Header:
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/// 1. length of section
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/// 2. Dwarf version number
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/// 3. address size.
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///
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/// Entries (one "entry" for each function that was inlined):
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///
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/// 1. offset into __debug_str section for MIPS linkage name, if exists;
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/// otherwise offset into __debug_str for regular function name.
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/// 2. offset into __debug_str section for regular function name.
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/// 3. an unsigned LEB128 number indicating the number of distinct inlining
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/// instances for the function.
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///
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/// The rest of the entry consists of a {die_offset, low_pc} pair for each
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/// inlined instance; the die_offset points to the inlined_subroutine die in
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/// the __debug_info section, and the low_pc is the starting address for the
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/// inlining instance.
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void emitDebugInlineInfo();
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/// GetOrCreateSourceID - Look up the source id with the given directory and
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/// source file names. If none currently exists, create a new id and insert it
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/// in the SourceIds map. This can update DirectoryNames and SourceFileNames
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/// maps as well.
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unsigned GetOrCreateSourceID(StringRef DirName, StringRef FileName);
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void constructCompileUnit(MDNode *N);
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void constructGlobalVariableDIE(MDNode *N);
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void constructSubprogramDIE(MDNode *N);
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// FIXME: This should go away in favor of complex addresses.
|
|
/// Find the type the programmer originally declared the variable to be
|
|
/// and return that type. Obsolete, use GetComplexAddrType instead.
|
|
///
|
|
DIType getBlockByrefType(DIType Ty, std::string Name);
|
|
|
|
public:
|
|
//===--------------------------------------------------------------------===//
|
|
// Main entry points.
|
|
//
|
|
DwarfDebug(AsmPrinter *A);
|
|
virtual ~DwarfDebug();
|
|
|
|
/// ShouldEmitDwarfDebug - Returns true if Dwarf debugging declarations should
|
|
/// be emitted.
|
|
bool ShouldEmitDwarfDebug() const { return shouldEmit; }
|
|
|
|
/// beginModule - Emit all Dwarf sections that should come prior to the
|
|
/// content.
|
|
void beginModule(Module *M);
|
|
|
|
/// endModule - Emit all Dwarf sections that should come after the content.
|
|
///
|
|
void endModule();
|
|
|
|
/// beginFunction - Gather pre-function debug information. Assumes being
|
|
/// emitted immediately after the function entry point.
|
|
void beginFunction(const MachineFunction *MF);
|
|
|
|
/// endFunction - Gather and emit post-function debug information.
|
|
///
|
|
void endFunction(const MachineFunction *MF);
|
|
|
|
/// recordSourceLine - Register a source line with debug info. Returns the
|
|
/// unique label that was emitted and which provides correspondence to
|
|
/// the source line list.
|
|
MCSymbol *recordSourceLine(unsigned Line, unsigned Col, MDNode *Scope);
|
|
|
|
/// getSourceLineCount - Return the number of source lines in the debug
|
|
/// info.
|
|
unsigned getSourceLineCount() const {
|
|
return Lines.size();
|
|
}
|
|
|
|
/// getOrCreateSourceID - Public version of GetOrCreateSourceID. This can be
|
|
/// timed. Look up the source id with the given directory and source file
|
|
/// names. If none currently exists, create a new id and insert it in the
|
|
/// SourceIds map. This can update DirectoryNames and SourceFileNames maps as
|
|
/// well.
|
|
unsigned getOrCreateSourceID(const std::string &DirName,
|
|
const std::string &FileName);
|
|
|
|
/// extractScopeInformation - Scan machine instructions in this function
|
|
/// and collect DbgScopes. Return true, if atleast one scope was found.
|
|
bool extractScopeInformation();
|
|
|
|
/// collectVariableInfo - Populate DbgScope entries with variables' info.
|
|
void collectVariableInfo();
|
|
|
|
/// beginScope - Process beginning of a scope.
|
|
void beginScope(const MachineInstr *MI);
|
|
|
|
/// endScope - Prcess end of a scope.
|
|
void endScope(const MachineInstr *MI);
|
|
};
|
|
} // End of namespace llvm
|
|
|
|
#endif
|