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//===-- 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 LLVM_LIB_CODEGEN_ASMPRINTER_DWARFCOMPILEUNIT_H
#define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFCOMPILEUNIT_H
#include "DwarfUnit.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/IR/DebugInfo.h"
namespace llvm {
class AsmPrinter;
class DIE;
class DwarfDebug;
class DwarfFile;
class MCSymbol;
class LexicalScope;
class DwarfCompileUnit : public DwarfUnit {
/// The attribute index of DW_AT_stmt_list in the compile unit DIE, avoiding
/// the need to search for it in applyStmtList.
unsigned stmtListIndex;
/// Skeleton unit associated with this unit.
DwarfCompileUnit *Skeleton;
/// \brief Construct a DIE for the given DbgVariable without initializing the
/// DbgVariable's DIE reference.
std::unique_ptr<DIE> constructVariableDIEImpl(const DbgVariable &DV,
bool Abstract);
public:
DwarfCompileUnit(unsigned UID, DICompileUnit Node, AsmPrinter *A,
DwarfDebug *DW, DwarfFile *DWU);
DwarfCompileUnit *getSkeleton() const {
return Skeleton;
}
void initStmtList(MCSymbol *DwarfLineSectionSym);
/// Apply the DW_AT_stmt_list from this compile unit to the specified DIE.
void applyStmtList(DIE &D);
/// getOrCreateGlobalVariableDIE - get or create global variable DIE.
DIE *getOrCreateGlobalVariableDIE(DIGlobalVariable GV);
/// addLabelAddress - Add a dwarf label attribute data and value using
/// either DW_FORM_addr or DW_FORM_GNU_addr_index.
void addLabelAddress(DIE &Die, dwarf::Attribute Attribute,
const MCSymbol *Label);
/// addLocalLabelAddress - Add a dwarf label attribute data and value using
/// DW_FORM_addr only.
void addLocalLabelAddress(DIE &Die, dwarf::Attribute Attribute,
const MCSymbol *Label);
/// addSectionDelta - Add a label delta attribute data and value.
void addSectionDelta(DIE &Die, dwarf::Attribute Attribute, const MCSymbol *Hi,
const MCSymbol *Lo);
DwarfCompileUnit &getCU() override { return *this; }
unsigned getOrCreateSourceID(StringRef FileName, StringRef DirName) override;
/// addRange - Add an address range to the list of ranges for this unit.
void addRange(RangeSpan Range);
void attachLowHighPC(DIE &D, const MCSymbol *Begin, const MCSymbol *End);
/// addSectionLabel - Add a Dwarf section label attribute data and value.
///
void addSectionLabel(DIE &Die, dwarf::Attribute Attribute,
const MCSymbol *Label, const MCSymbol *Sec);
/// \brief Find DIE for the given subprogram and attach appropriate
/// DW_AT_low_pc and DW_AT_high_pc attributes. If there are global
/// variables in this scope then create and insert DIEs for these
/// variables.
DIE &updateSubprogramScopeDIE(DISubprogram SP);
void constructScopeDIE(LexicalScope *Scope,
SmallVectorImpl<std::unique_ptr<DIE>> &FinalChildren);
/// \brief A helper function to construct a RangeSpanList for a given
/// lexical scope.
void addScopeRangeList(DIE &ScopeDIE,
const SmallVectorImpl<InsnRange> &Range);
void attachRangesOrLowHighPC(DIE &D,
const SmallVectorImpl<InsnRange> &Ranges);
/// \brief This scope represents inlined body of a function. Construct
/// DIE to represent this concrete inlined copy of the function.
std::unique_ptr<DIE> constructInlinedScopeDIE(LexicalScope *Scope);
/// \brief Construct new DW_TAG_lexical_block for this scope and
/// attach DW_AT_low_pc/DW_AT_high_pc labels.
std::unique_ptr<DIE> constructLexicalScopeDIE(LexicalScope *Scope);
/// constructVariableDIE - Construct a DIE for the given DbgVariable.
std::unique_ptr<DIE> constructVariableDIE(DbgVariable &DV,
bool Abstract = false);
std::unique_ptr<DIE> constructVariableDIE(DbgVariable &DV,
const LexicalScope &Scope,
DIE *&ObjectPointer);
/// A helper function to create children of a Scope DIE.
DIE *createScopeChildrenDIE(LexicalScope *Scope,
SmallVectorImpl<std::unique_ptr<DIE>> &Children,
unsigned *ChildScopeCount = nullptr);
/// \brief Construct a DIE for this subprogram scope.
void constructSubprogramScopeDIE(LexicalScope *Scope);
DIE *createAndAddScopeChildren(LexicalScope *Scope, DIE &ScopeDIE);
void constructAbstractSubprogramScopeDIE(LexicalScope *Scope);
/// \brief Construct import_module DIE.
std::unique_ptr<DIE>
constructImportedEntityDIE(const DIImportedEntity &Module);
void finishSubprogramDefinition(DISubprogram SP);
void collectDeadVariables(DISubprogram SP);
/// If there's a skeleton then return the begin label for the skeleton unit,
/// otherwise return the local label for this unit.
MCSymbol *getLocalLabelBegin() const {
if (Skeleton)
return Skeleton->getLabelBegin();
return getLabelBegin();
}
/// If there's a skeleton then return the section symbol for the skeleton
/// unit, otherwise return the section symbol for this unit.
MCSymbol *getLocalSectionSym() const {
if (Skeleton)
return Skeleton->getSectionSym();
return getSectionSym();
}
/// Set the skeleton unit associated with this unit.
void setSkeleton(DwarfCompileUnit &Skel) { Skeleton = &Skel; }
};
} // end llvm namespace
#endif
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