llvm-6502/lib/CodeGen/AsmPrinter/DwarfDebug.h
2009-11-10 23:06:00 +00:00

581 lines
21 KiB
C++

//===-- llvm/CodeGen/DwarfDebug.h - Dwarf Debug Framework ------*- C++ -*--===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains support for writing dwarf debug info into asm files.
//
//===----------------------------------------------------------------------===//
#ifndef CODEGEN_ASMPRINTER_DWARFDEBUG_H__
#define CODEGEN_ASMPRINTER_DWARFDEBUG_H__
#include "DIE.h"
#include "DwarfPrinter.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineLocation.h"
#include "llvm/Analysis/DebugInfo.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/ValueMap.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/ADT/UniqueVector.h"
#include <string>
namespace llvm {
class CompileUnit;
class DbgVariable;
class DbgScope;
class DbgConcreteScope;
class MachineFrameInfo;
class MachineModuleInfo;
class MCAsmInfo;
class Timer;
//===----------------------------------------------------------------------===//
/// SrcLineInfo - This class is used to record source line correspondence.
///
class VISIBILITY_HIDDEN SrcLineInfo {
unsigned Line; // Source line number.
unsigned Column; // Source column.
unsigned SourceID; // Source ID number.
unsigned LabelID; // Label in code ID number.
public:
SrcLineInfo(unsigned L, unsigned C, unsigned S, unsigned I)
: Line(L), Column(C), SourceID(S), LabelID(I) {}
// Accessors
unsigned getLine() const { return Line; }
unsigned getColumn() const { return Column; }
unsigned getSourceID() const { return SourceID; }
unsigned getLabelID() const { return LabelID; }
};
class VISIBILITY_HIDDEN DwarfDebug : public Dwarf {
//===--------------------------------------------------------------------===//
// Attributes used to construct specific Dwarf sections.
//
/// CompileUnitMap - A map of global variables representing compile units to
/// compile units.
DenseMap<Value *, CompileUnit *> CompileUnitMap;
/// CompileUnits - All the compile units in this module.
///
SmallVector<CompileUnit *, 8> CompileUnits;
/// ModuleCU - All DIEs are inserted in ModuleCU.
CompileUnit *ModuleCU;
/// AbbreviationsSet - Used to uniquely define abbreviations.
///
FoldingSet<DIEAbbrev> AbbreviationsSet;
/// Abbreviations - A list of all the unique abbreviations in use.
///
std::vector<DIEAbbrev *> Abbreviations;
/// DirectoryIdMap - Directory name to directory id map.
///
StringMap<unsigned> DirectoryIdMap;
/// DirectoryNames - A list of directory names.
SmallVector<std::string, 8> DirectoryNames;
/// SourceFileIdMap - Source file name to source file id map.
///
StringMap<unsigned> SourceFileIdMap;
/// SourceFileNames - A list of source file names.
SmallVector<std::string, 8> SourceFileNames;
/// SourceIdMap - Source id map, i.e. pair of directory id and source file
/// id mapped to a unique id.
DenseMap<std::pair<unsigned, unsigned>, unsigned> SourceIdMap;
/// SourceIds - Reverse map from source id to directory id + file id pair.
///
SmallVector<std::pair<unsigned, unsigned>, 8> SourceIds;
/// Lines - List of of source line correspondence.
std::vector<SrcLineInfo> Lines;
/// ValuesSet - Used to uniquely define values.
///
FoldingSet<DIEValue> ValuesSet;
/// Values - A list of all the unique values in use.
///
std::vector<DIEValue *> Values;
/// StringPool - A UniqueVector of strings used by indirect references.
///
UniqueVector<std::string> StringPool;
/// SectionMap - Provides a unique id per text section.
///
UniqueVector<const MCSection*> SectionMap;
/// SectionSourceLines - Tracks line numbers per text section.
///
std::vector<std::vector<SrcLineInfo> > SectionSourceLines;
/// didInitial - Flag to indicate if initial emission has been done.
///
bool didInitial;
/// shouldEmit - Flag to indicate if debug information should be emitted.
///
bool shouldEmit;
// CurrentFnDbgScope - Top level scope for the current function.
//
DbgScope *CurrentFnDbgScope;
/// DbgScopeMap - Tracks the scopes in the current function.
///
ValueMap<MDNode *, DbgScope *> DbgScopeMap;
/// ConcreteScopes - Tracks the concrete scopees in the current function.
/// These scopes are also included in DbgScopeMap.
ValueMap<MDNode *, DbgScope *> ConcreteScopes;
/// AbstractScopes - Tracks the abstract scopes a module. These scopes are
/// not included DbgScopeMap.
ValueMap<MDNode *, DbgScope *> AbstractScopes;
SmallVector<DbgScope *, 4>AbstractScopesList;
/// AbstractVariables - Collection on abstract variables.
ValueMap<MDNode *, DbgVariable *> AbstractVariables;
/// InliendSubprogramDIEs - Collection of subprgram DIEs that are marked
/// (at the end of the module) as DW_AT_inline.
SmallPtrSet<DIE *, 4> InlinedSubprogramDIEs;
/// AbstractSubprogramDIEs - Collection of abstruct subprogram DIEs.
SmallPtrSet<DIE *, 4> AbstractSubprogramDIEs;
/// ScopedGVs - Tracks global variables that are not at file scope.
/// For example void f() { static int b = 42; }
SmallVector<WeakVH, 4> ScopedGVs;
typedef SmallVector<DbgScope *, 2> ScopeVector;
typedef DenseMap<const MachineInstr *, ScopeVector>
InsnToDbgScopeMapTy;
/// DbgScopeBeginMap - Maps instruction with a list of DbgScopes it starts.
InsnToDbgScopeMapTy DbgScopeBeginMap;
/// DbgScopeEndMap - Maps instruction with a list DbgScopes it ends.
InsnToDbgScopeMapTy DbgScopeEndMap;
/// InlineInfo - Keep track of inlined functions and their location. This
/// information is used to populate debug_inlined section.
typedef std::pair<unsigned, DIE *> InlineInfoLabels;
ValueMap<MDNode *, SmallVector<InlineInfoLabels, 4> > InlineInfo;
SmallVector<MDNode *, 4> InlinedSPNodes;
/// CompileUnitOffsets - A vector of the offsets of the compile units. This is
/// used when calculating the "origin" of a concrete instance of an inlined
/// function.
DenseMap<CompileUnit *, unsigned> CompileUnitOffsets;
/// DebugTimer - Timer for the Dwarf debug writer.
Timer *DebugTimer;
struct FunctionDebugFrameInfo {
unsigned Number;
std::vector<MachineMove> Moves;
FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M)
: Number(Num), Moves(M) {}
};
std::vector<FunctionDebugFrameInfo> DebugFrames;
/// getSourceDirectoryAndFileIds - Return the directory and file ids that
/// maps to the source id. Source id starts at 1.
std::pair<unsigned, unsigned>
getSourceDirectoryAndFileIds(unsigned SId) const {
return SourceIds[SId-1];
}
/// getNumSourceDirectories - Return the number of source directories in the
/// debug info.
unsigned getNumSourceDirectories() const {
return DirectoryNames.size();
}
/// getSourceDirectoryName - Return the name of the directory corresponding
/// to the id.
const std::string &getSourceDirectoryName(unsigned Id) const {
return DirectoryNames[Id - 1];
}
/// getSourceFileName - Return the name of the source file corresponding
/// to the id.
const std::string &getSourceFileName(unsigned Id) const {
return SourceFileNames[Id - 1];
}
/// getNumSourceIds - Return the number of unique source ids.
unsigned getNumSourceIds() const {
return SourceIds.size();
}
/// AssignAbbrevNumber - Define a unique number for the abbreviation.
///
void AssignAbbrevNumber(DIEAbbrev &Abbrev);
/// CreateDIEEntry - Creates a new DIEEntry to be a proxy for a debug
/// information entry.
DIEEntry *CreateDIEEntry(DIE *Entry = NULL);
/// SetDIEEntry - Set a DIEEntry once the debug information entry is defined.
///
void SetDIEEntry(DIEEntry *Value, DIE *Entry);
/// AddUInt - Add an unsigned integer attribute data and value.
///
void AddUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer);
/// AddSInt - Add an signed integer attribute data and value.
///
void AddSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer);
/// AddString - Add a string attribute data and value.
///
void AddString(DIE *Die, unsigned Attribute, unsigned Form,
const std::string &String);
/// AddLabel - Add a Dwarf label attribute data and value.
///
void AddLabel(DIE *Die, unsigned Attribute, unsigned Form,
const DWLabel &Label);
/// AddObjectLabel - Add an non-Dwarf label attribute data and value.
///
void AddObjectLabel(DIE *Die, unsigned Attribute, unsigned Form,
const std::string &Label);
/// AddSectionOffset - Add a section offset label attribute data and value.
///
void AddSectionOffset(DIE *Die, unsigned Attribute, unsigned Form,
const DWLabel &Label, const DWLabel &Section,
bool isEH = false, bool useSet = true);
/// AddDelta - Add a label delta attribute data and value.
///
void AddDelta(DIE *Die, unsigned Attribute, unsigned Form,
const DWLabel &Hi, const DWLabel &Lo);
/// AddDIEEntry - Add a DIE attribute data and value.
///
void AddDIEEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry) {
Die->AddValue(Attribute, Form, CreateDIEEntry(Entry));
}
/// AddBlock - Add block data.
///
void AddBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block);
/// AddSourceLine - Add location information to specified debug information
/// entry.
void AddSourceLine(DIE *Die, const DIVariable *V);
void AddSourceLine(DIE *Die, const DIGlobal *G);
void AddSourceLine(DIE *Die, const DISubprogram *SP);
void AddSourceLine(DIE *Die, const DIType *Ty);
/// AddAddress - Add an address attribute to a die based on the location
/// provided.
void AddAddress(DIE *Die, unsigned Attribute,
const MachineLocation &Location);
/// AddComplexAddress - Start with the address based on the location provided,
/// and generate the DWARF information necessary to find the actual variable
/// (navigating the extra location information encoded in the type) based on
/// the starting location. Add the DWARF information to the die.
///
void AddComplexAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute,
const MachineLocation &Location);
// FIXME: Should be reformulated in terms of AddComplexAddress.
/// AddBlockByrefAddress - Start with the address based on the location
/// provided, and generate the DWARF information necessary to find the
/// actual Block variable (navigating the Block struct) based on the
/// starting location. Add the DWARF information to the die. Obsolete,
/// please use AddComplexAddress instead.
///
void AddBlockByrefAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute,
const MachineLocation &Location);
/// AddType - Add a new type attribute to the specified entity.
void AddType(CompileUnit *DW_Unit, DIE *Entity, DIType Ty);
/// ConstructTypeDIE - Construct basic type die from DIBasicType.
void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
DIBasicType BTy);
/// ConstructTypeDIE - Construct derived type die from DIDerivedType.
void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
DIDerivedType DTy);
/// ConstructTypeDIE - Construct type DIE from DICompositeType.
void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
DICompositeType CTy);
/// ConstructSubrangeDIE - Construct subrange DIE from DISubrange.
void ConstructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy);
/// ConstructArrayTypeDIE - Construct array type DIE from DICompositeType.
void ConstructArrayTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
DICompositeType *CTy);
/// ConstructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
DIE *ConstructEnumTypeDIE(CompileUnit *DW_Unit, DIEnumerator *ETy);
/// CreateGlobalVariableDIE - Create new DIE using GV.
DIE *CreateGlobalVariableDIE(CompileUnit *DW_Unit,
const DIGlobalVariable &GV);
/// CreateMemberDIE - Create new member DIE.
DIE *CreateMemberDIE(CompileUnit *DW_Unit, const DIDerivedType &DT);
/// CreateSubprogramDIE - Create new DIE using SP.
DIE *CreateSubprogramDIE(CompileUnit *DW_Unit,
const DISubprogram &SP,
bool IsConstructor = false,
bool IsInlined = false);
/// FindCompileUnit - Get the compile unit for the given descriptor.
///
CompileUnit &FindCompileUnit(DICompileUnit Unit) const;
/// CreateDbgScopeVariable - Create a new scope variable.
///
DIE *CreateDbgScopeVariable(DbgVariable *DV, CompileUnit *Unit);
/// getUpdatedDbgScope - Find or create DbgScope assicated with
/// the instruction. Initialize scope and update scope hierarchy.
DbgScope *getUpdatedDbgScope(MDNode *N, const MachineInstr *MI, MDNode *InlinedAt);
/// createDbgScope - Create DbgScope for the scope.
void createDbgScope(MDNode *Scope, MDNode *InlinedAt);
DbgScope *getOrCreateScope(MDNode *N);
DbgScope *getOrCreateAbstractScope(MDNode *N);
/// findAbstractVariable - Find abstract variable associated with Var.
DbgVariable *findAbstractVariable(DIVariable &Var, unsigned FrameIdx,
DILocation &Loc);
DIE *UpdateSubprogramScopeDIE(MDNode *SPNode);
DIE *ConstructLexicalScopeDIE(DbgScope *Scope);
DIE *ConstructScopeDIE(DbgScope *Scope);
DIE *ConstructInlinedScopeDIE(DbgScope *Scope);
DIE *ConstructVariableDIE(DbgVariable *DV, DbgScope *S, CompileUnit *Unit);
/// ConstructDbgScope - Construct the components of a scope.
///
void ConstructDbgScope(DbgScope *ParentScope,
unsigned ParentStartID, unsigned ParentEndID,
DIE *ParentDie, CompileUnit *Unit);
/// ConstructCurrentFnDbgScope - Construct the scope for the subprogram.
///
void ConstructCurrentFnDbgScope(DbgScope *RootScope,
bool AbstractScope = false);
/// ConstructDefaultDbgScope - Construct a default scope for the subprogram.
///
void ConstructDefaultDbgScope(MachineFunction *MF);
/// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc
/// tools to recognize the object file contains Dwarf information.
void EmitInitial();
/// EmitDIE - Recusively Emits a debug information entry.
///
void EmitDIE(DIE *Die);
/// SizeAndOffsetDie - Compute the size and offset of a DIE.
///
unsigned SizeAndOffsetDie(DIE *Die, unsigned Offset, bool Last);
/// SizeAndOffsets - Compute the size and offset of all the DIEs.
///
void SizeAndOffsets();
/// EmitDebugInfo / EmitDebugInfoPerCU - Emit the debug info section.
///
void EmitDebugInfoPerCU(CompileUnit *Unit);
void EmitDebugInfo();
/// EmitAbbreviations - Emit the abbreviation section.
///
void EmitAbbreviations() const;
/// EmitEndOfLineMatrix - Emit the last address of the section and the end of
/// the line matrix.
///
void EmitEndOfLineMatrix(unsigned SectionEnd);
/// EmitDebugLines - Emit source line information.
///
void EmitDebugLines();
/// EmitCommonDebugFrame - Emit common frame info into a debug frame section.
///
void EmitCommonDebugFrame();
/// EmitFunctionDebugFrame - Emit per function frame info into a debug frame
/// section.
void EmitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo);
void EmitDebugPubNamesPerCU(CompileUnit *Unit);
/// EmitDebugPubNames - Emit visible names into a debug pubnames section.
///
void EmitDebugPubNames();
/// EmitDebugStr - Emit visible names into a debug str section.
///
void EmitDebugStr();
/// EmitDebugLoc - Emit visible names into a debug loc section.
///
void EmitDebugLoc();
/// EmitDebugARanges - Emit visible names into a debug aranges section.
///
void EmitDebugARanges();
/// EmitDebugRanges - Emit visible names into a debug ranges section.
///
void EmitDebugRanges();
/// EmitDebugMacInfo - Emit visible names into a debug macinfo section.
///
void EmitDebugMacInfo();
/// EmitDebugInlineInfo - Emit inline info using following format.
/// Section Header:
/// 1. length of section
/// 2. Dwarf version number
/// 3. address size.
///
/// Entries (one "entry" for each function that was inlined):
///
/// 1. offset into __debug_str section for MIPS linkage name, if exists;
/// otherwise offset into __debug_str for regular function name.
/// 2. offset into __debug_str section for regular function name.
/// 3. an unsigned LEB128 number indicating the number of distinct inlining
/// instances for the function.
///
/// The rest of the entry consists of a {die_offset, low_pc} pair for each
/// inlined instance; the die_offset points to the inlined_subroutine die in
/// the __debug_info section, and the low_pc is the starting address for the
/// inlining instance.
void EmitDebugInlineInfo();
/// GetOrCreateSourceID - 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 char *DirName,
const char *FileName);
void ConstructCompileUnit(MDNode *N);
void ConstructGlobalVariableDIE(MDNode *N);
void ConstructSubprogram(MDNode *N);
// 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(raw_ostream &OS, AsmPrinter *A, const MCAsmInfo *T);
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, MachineModuleInfo *MMI);
/// 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(MachineFunction *MF);
/// EndFunction - Gather and emit post-function debug information.
///
void EndFunction(MachineFunction *MF);
/// RecordSourceLine - Records location information and associates it with a
/// label. Returns a unique label ID used to generate a label and provide
/// correspondence to the source line list.
unsigned RecordSourceLine(unsigned Line, unsigned Col, MDNode *Scope);
/// getRecordSourceLineCount - Return the number of source lines in the debug
/// info.
unsigned getRecordSourceLineCount() 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);
/// RecordRegionStart - Indicate the start of a region.
unsigned RecordRegionStart(MDNode *N);
/// RecordRegionEnd - Indicate the end of a region.
unsigned RecordRegionEnd(MDNode *N);
/// RecordVariable - Indicate the declaration of a local variable.
void RecordVariable(MDNode *N, unsigned FrameIndex);
/// ExtractScopeInformation - Scan machine instructions in this function
/// and collect DbgScopes. Return true, if atleast one scope was found.
bool ExtractScopeInformation(MachineFunction *MF);
/// CollectVariableInfo - Populate DbgScope entries with variables' info.
void CollectVariableInfo();
/// SetDbgScopeEndLabels - Update DbgScope end labels for the scopes that
/// end with this machine instruction.
void SetDbgScopeEndLabels(const MachineInstr *MI, unsigned Label);
/// BeginScope - Process beginning of a scope starting at Label.
void BeginScope(const MachineInstr *MI, unsigned Label);
/// EndScope - Prcess end of a scope.
void EndScope(const MachineInstr *MI);
};
} // End of namespace llvm
#endif