llvm-6502/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
Manman Ren bc3e96f17b Debug Info: use DW_FORM_ref_addr instead of DW_FORM_ref4 if the referenced DIE
belongs to a different compile unit.

DW_FORM_ref_addr should be used for cross compile-unit reference.

When compiling a large application, we got a dwarfdump verification error where
abstract_origin points to nowhere.

This error can't be reproduced on any testing case in MultiSource.
We may have other cases where we use DW_FORM_ref4 unconditionally.

rdar://problem/13370501


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176882 91177308-0d34-0410-b5e6-96231b3b80d8
2013-03-12 18:27:15 +00:00

384 lines
14 KiB
C++

//===-- llvm/CodeGen/DwarfCompileUnit.h - Dwarf Compile Unit ---*- 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 compile unit.
//
//===----------------------------------------------------------------------===//
#ifndef CODEGEN_ASMPRINTER_DWARFCOMPILEUNIT_H
#define CODEGEN_ASMPRINTER_DWARFCOMPILEUNIT_H
#include "DIE.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/StringMap.h"
#include "llvm/DebugInfo.h"
namespace llvm {
class DwarfDebug;
class DwarfUnits;
class MachineLocation;
class MachineOperand;
class ConstantInt;
class ConstantFP;
class DbgVariable;
//===----------------------------------------------------------------------===//
/// CompileUnit - This dwarf writer support class manages information associated
/// with a source file.
class CompileUnit {
/// UniqueID - a numeric ID unique among all CUs in the module
///
unsigned UniqueID;
/// Language - The DW_AT_language of the compile unit
///
unsigned Language;
/// Die - Compile unit debug information entry.
///
const OwningPtr<DIE> CUDie;
/// Asm - Target of Dwarf emission.
AsmPrinter *Asm;
// Holders for some common dwarf information.
DwarfDebug *DD;
DwarfUnits *DU;
/// IndexTyDie - An anonymous type for index type. Owned by CUDie.
DIE *IndexTyDie;
/// MDNodeToDieMap - Tracks the mapping of unit level debug informaton
/// variables to debug information entries.
DenseMap<const MDNode *, DIE *> MDNodeToDieMap;
/// MDNodeToDIEEntryMap - Tracks the mapping of unit level debug informaton
/// descriptors to debug information entries using a DIEEntry proxy.
DenseMap<const MDNode *, DIEEntry *> MDNodeToDIEEntryMap;
/// GlobalNames - A map of globally visible named entities for this unit.
///
StringMap<DIE*> GlobalNames;
/// GlobalTypes - A map of globally visible types for this unit.
///
StringMap<DIE*> GlobalTypes;
/// AccelNames - A map of names for the name accelerator table.
///
StringMap<std::vector<DIE*> > AccelNames;
StringMap<std::vector<DIE*> > AccelObjC;
StringMap<std::vector<DIE*> > AccelNamespace;
StringMap<std::vector<std::pair<DIE*, unsigned> > > AccelTypes;
/// DIEBlocks - A list of all the DIEBlocks in use.
std::vector<DIEBlock *> DIEBlocks;
/// ContainingTypeMap - This map is used to keep track of subprogram DIEs that
/// need DW_AT_containing_type attribute. This attribute points to a DIE that
/// corresponds to the MDNode mapped with the subprogram DIE.
DenseMap<DIE *, const MDNode *> ContainingTypeMap;
/// Offset of the CUDie from beginning of debug info section.
unsigned DebugInfoOffset;
/// getLowerBoundDefault - Return the default lower bound for an array. If the
/// DWARF version doesn't handle the language, return -1.
int64_t getDefaultLowerBound() const;
/// getOrCreateContextDIE - Get context owner's DIE.
DIE *getOrCreateContextDIE(DIDescriptor Context);
public:
CompileUnit(unsigned UID, unsigned L, DIE *D, AsmPrinter *A, DwarfDebug *DW,
DwarfUnits *);
~CompileUnit();
// Accessors.
unsigned getUniqueID() const { return UniqueID; }
unsigned getLanguage() const { return Language; }
DIE* getCUDie() const { return CUDie.get(); }
unsigned getDebugInfoOffset() const { return DebugInfoOffset; }
const StringMap<DIE*> &getGlobalNames() const { return GlobalNames; }
const StringMap<DIE*> &getGlobalTypes() const { return GlobalTypes; }
const StringMap<std::vector<DIE*> > &getAccelNames() const {
return AccelNames;
}
const StringMap<std::vector<DIE*> > &getAccelObjC() const {
return AccelObjC;
}
const StringMap<std::vector<DIE*> > &getAccelNamespace() const {
return AccelNamespace;
}
const StringMap<std::vector<std::pair<DIE*, unsigned > > >
&getAccelTypes() const {
return AccelTypes;
}
void setDebugInfoOffset(unsigned DbgInfoOff) { DebugInfoOffset = DbgInfoOff; }
/// hasContent - Return true if this compile unit has something to write out.
///
bool hasContent() const { return !CUDie->getChildren().empty(); }
/// addGlobalName - Add a new global entity to the compile unit.
///
void addGlobalName(StringRef Name, DIE *Die) { GlobalNames[Name] = Die; }
/// addGlobalType - Add a new global type to the compile unit.
///
void addGlobalType(DIType Ty);
/// addAccelName - Add a new name to the name accelerator table.
void addAccelName(StringRef Name, DIE *Die) {
std::vector<DIE*> &DIEs = AccelNames[Name];
DIEs.push_back(Die);
}
void addAccelObjC(StringRef Name, DIE *Die) {
std::vector<DIE*> &DIEs = AccelObjC[Name];
DIEs.push_back(Die);
}
void addAccelNamespace(StringRef Name, DIE *Die) {
std::vector<DIE*> &DIEs = AccelNamespace[Name];
DIEs.push_back(Die);
}
void addAccelType(StringRef Name, std::pair<DIE *, unsigned> Die) {
std::vector<std::pair<DIE*, unsigned > > &DIEs = AccelTypes[Name];
DIEs.push_back(Die);
}
/// getDIE - Returns the debug information entry map slot for the
/// specified debug variable.
DIE *getDIE(const MDNode *N) { return MDNodeToDieMap.lookup(N); }
DIEBlock *getDIEBlock() {
return new (DIEValueAllocator) DIEBlock();
}
/// insertDIE - Insert DIE into the map.
void insertDIE(const MDNode *N, DIE *D) {
MDNodeToDieMap.insert(std::make_pair(N, D));
}
/// getDIEEntry - Returns the debug information entry for the specified
/// debug variable.
DIEEntry *getDIEEntry(const MDNode *N) {
DenseMap<const MDNode *, DIEEntry *>::iterator I =
MDNodeToDIEEntryMap.find(N);
if (I == MDNodeToDIEEntryMap.end())
return NULL;
return I->second;
}
/// insertDIEEntry - Insert debug information entry into the map.
void insertDIEEntry(const MDNode *N, DIEEntry *E) {
MDNodeToDIEEntryMap.insert(std::make_pair(N, E));
}
/// addDie - Adds or interns the DIE to the compile unit.
///
void addDie(DIE *Buffer) {
this->CUDie->addChild(Buffer);
}
// getIndexTyDie - Get an anonymous type for index type.
DIE *getIndexTyDie() {
return IndexTyDie;
}
// setIndexTyDie - Set D as anonymous type for index which can be reused
// later.
void setIndexTyDie(DIE *D) {
IndexTyDie = D;
}
/// addFlag - Add a flag that is true to the DIE.
void addFlag(DIE *Die, unsigned Attribute);
/// 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, const StringRef Str);
/// addLocalString - Add a string attribute data and value.
///
void addLocalString(DIE *Die, unsigned Attribute, const StringRef Str);
/// addLabel - Add a Dwarf label attribute data and value.
///
void addLabel(DIE *Die, unsigned Attribute, unsigned Form,
const MCSymbol *Label);
/// addLabelAddress - Add a dwarf label attribute data and value using
/// either DW_FORM_addr or DW_FORM_GNU_addr_index.
///
void addLabelAddress(DIE *Die, unsigned Attribute, MCSymbol *Label);
/// addOpAddress - Add a dwarf op address data and value using the
/// form given and an op of either DW_FORM_addr or DW_FORM_GNU_addr_index.
///
void addOpAddress(DIE *Die, MCSymbol *Label);
/// addDelta - Add a label delta attribute data and value.
///
void addDelta(DIE *Die, unsigned Attribute, unsigned Form,
const MCSymbol *Hi, const MCSymbol *Lo);
/// addDIEEntry - Add a DIE attribute data and value.
///
void addDIEEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *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, DIVariable V);
void addSourceLine(DIE *Die, DIGlobalVariable G);
void addSourceLine(DIE *Die, DISubprogram SP);
void addSourceLine(DIE *Die, DIType Ty);
void addSourceLine(DIE *Die, DINameSpace NS);
void addSourceLine(DIE *Die, DIObjCProperty Ty);
/// addAddress - Add an address attribute to a die based on the location
/// provided.
void addAddress(DIE *Die, unsigned Attribute,
const MachineLocation &Location);
/// addConstantValue - Add constant value entry in variable DIE.
bool addConstantValue(DIE *Die, const MachineOperand &MO, DIType Ty);
bool addConstantValue(DIE *Die, const ConstantInt *CI, bool Unsigned);
bool addConstantValue(DIE *Die, const APInt &Val, bool Unsigned);
/// addConstantFPValue - Add constant value entry in variable DIE.
bool addConstantFPValue(DIE *Die, const MachineOperand &MO);
bool addConstantFPValue(DIE *Die, const ConstantFP *CFP);
/// addTemplateParams - Add template parameters in buffer.
void addTemplateParams(DIE &Buffer, DIArray TParams);
/// addRegisterOp - Add register operand.
void addRegisterOp(DIE *TheDie, unsigned Reg);
/// addRegisterOffset - Add register offset.
void addRegisterOffset(DIE *TheDie, unsigned Reg, int64_t Offset);
/// 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);
/// addVariableAddress - Add DW_AT_location attribute for a
/// DbgVariable based on provided MachineLocation.
void addVariableAddress(DbgVariable *&DV, DIE *Die, MachineLocation Location);
/// addToContextOwner - Add Die into the list of its context owner's children.
void addToContextOwner(DIE *Die, DIDescriptor Context);
/// addType - Add a new type attribute to the specified entity. This takes
/// and attribute parameter because DW_AT_friend attributes are also
/// type references.
void addType(DIE *Entity, DIType Ty, unsigned Attribute = dwarf::DW_AT_type);
/// getOrCreateNameSpace - Create a DIE for DINameSpace.
DIE *getOrCreateNameSpace(DINameSpace NS);
/// getOrCreateSubprogramDIE - Create new DIE using SP.
DIE *getOrCreateSubprogramDIE(DISubprogram SP);
/// getOrCreateTypeDIE - Find existing DIE or create new DIE for the
/// given DIType.
DIE *getOrCreateTypeDIE(const MDNode *N);
/// getOrCreateTemplateTypeParameterDIE - Find existing DIE or create new DIE
/// for the given DITemplateTypeParameter.
DIE *getOrCreateTemplateTypeParameterDIE(DITemplateTypeParameter TP);
/// getOrCreateTemplateValueParameterDIE - Find existing DIE or create
/// new DIE for the given DITemplateValueParameter.
DIE *getOrCreateTemplateValueParameterDIE(DITemplateValueParameter TVP);
/// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug
/// information entry.
DIEEntry *createDIEEntry(DIE *Entry);
/// createGlobalVariableDIE - create global variable DIE.
void createGlobalVariableDIE(const MDNode *N);
void addPubTypes(DISubprogram SP);
/// constructTypeDIE - Construct basic type die from DIBasicType.
void constructTypeDIE(DIE &Buffer,
DIBasicType BTy);
/// constructTypeDIE - Construct derived type die from DIDerivedType.
void constructTypeDIE(DIE &Buffer,
DIDerivedType DTy);
/// constructTypeDIE - Construct type DIE from DICompositeType.
void constructTypeDIE(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(DIE &Buffer,
DICompositeType *CTy);
/// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
DIE *constructEnumTypeDIE(DIEnumerator ETy);
/// constructContainingTypeDIEs - Construct DIEs for types that contain
/// vtables.
void constructContainingTypeDIEs();
/// constructVariableDIE - Construct a DIE for the given DbgVariable.
DIE *constructVariableDIE(DbgVariable *DV, bool isScopeAbstract);
/// createMemberDIE - Create new member DIE.
DIE *createMemberDIE(DIDerivedType DT);
/// createStaticMemberDIE - Create new static data member DIE.
DIE *createStaticMemberDIE(DIDerivedType DT);
private:
// DIEValueAllocator - All DIEValues are allocated through this allocator.
BumpPtrAllocator DIEValueAllocator;
DIEInteger *DIEIntegerOne;
};
} // end llvm namespace
#endif