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7478c406d6
A DWARFUnitSection is the collection of Units that have been extracted from
the same debug section.
By embeding a reference to their DWARFUnitSection in each unit, the DIEs
will be able to resolve inter-unit references by interrogating their Unit's
DWARFUnitSection.
This is a minimal patch where the DWARFUnitSection is-a SmallVector of Units,
thus exposing exactly the same interface as before. Followup-up patches might
change from inheritance to composition in order to expose only the wanted
DWARFUnitSection abstraction.
Differential Revision: http://reviews.llvm.org/D5310
llvm-svn: 217747
283 lines
9.7 KiB
C++
283 lines
9.7 KiB
C++
//===-- DWARFContext.h ------------------------------------------*- 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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#ifndef LLVM_LIB_DEBUGINFO_DWARFCONTEXT_H
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#define LLVM_LIB_DEBUGINFO_DWARFCONTEXT_H
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#include "DWARFCompileUnit.h"
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#include "DWARFDebugAranges.h"
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#include "DWARFDebugFrame.h"
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#include "DWARFDebugLine.h"
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#include "DWARFDebugLoc.h"
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#include "DWARFDebugRangeList.h"
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#include "DWARFTypeUnit.h"
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#include "llvm/ADT/MapVector.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/DebugInfo/DIContext.h"
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namespace llvm {
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/// DWARFContext
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/// This data structure is the top level entity that deals with dwarf debug
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/// information parsing. The actual data is supplied through pure virtual
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/// methods that a concrete implementation provides.
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class DWARFContext : public DIContext {
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DWARFUnitSection<DWARFCompileUnit> CUs;
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DWARFUnitSection<DWARFTypeUnit> TUs;
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std::unique_ptr<DWARFDebugAbbrev> Abbrev;
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std::unique_ptr<DWARFDebugLoc> Loc;
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std::unique_ptr<DWARFDebugAranges> Aranges;
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std::unique_ptr<DWARFDebugLine> Line;
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std::unique_ptr<DWARFDebugFrame> DebugFrame;
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DWARFUnitSection<DWARFCompileUnit> DWOCUs;
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DWARFUnitSection<DWARFTypeUnit> DWOTUs;
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std::unique_ptr<DWARFDebugAbbrev> AbbrevDWO;
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std::unique_ptr<DWARFDebugLocDWO> LocDWO;
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DWARFContext(DWARFContext &) LLVM_DELETED_FUNCTION;
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DWARFContext &operator=(DWARFContext &) LLVM_DELETED_FUNCTION;
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/// Read compile units from the debug_info section (if necessary)
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/// and store them in CUs.
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void parseCompileUnits();
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/// Read type units from the debug_types sections (if necessary)
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/// and store them in TUs.
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void parseTypeUnits();
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/// Read compile units from the debug_info.dwo section (if necessary)
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/// and store them in DWOCUs.
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void parseDWOCompileUnits();
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/// Read type units from the debug_types.dwo section (if necessary)
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/// and store them in DWOTUs.
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void parseDWOTypeUnits();
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public:
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struct Section {
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StringRef Data;
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RelocAddrMap Relocs;
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};
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DWARFContext() : DIContext(CK_DWARF) {}
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static bool classof(const DIContext *DICtx) {
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return DICtx->getKind() == CK_DWARF;
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}
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void dump(raw_ostream &OS, DIDumpType DumpType = DIDT_All) override;
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typedef DWARFUnitSection<DWARFCompileUnit>::iterator_range cu_iterator_range;
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typedef DWARFUnitSection<DWARFTypeUnit>::iterator_range tu_iterator_range;
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/// Get compile units in this context.
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cu_iterator_range compile_units() {
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parseCompileUnits();
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return cu_iterator_range(CUs.begin(), CUs.end());
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}
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/// Get type units in this context.
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tu_iterator_range type_units() {
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parseTypeUnits();
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return tu_iterator_range(TUs.begin(), TUs.end());
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}
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/// Get compile units in the DWO context.
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cu_iterator_range dwo_compile_units() {
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parseDWOCompileUnits();
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return cu_iterator_range(DWOCUs.begin(), DWOCUs.end());
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}
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/// Get type units in the DWO context.
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tu_iterator_range dwo_type_units() {
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parseDWOTypeUnits();
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return tu_iterator_range(DWOTUs.begin(), DWOTUs.end());
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}
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/// Get the number of compile units in this context.
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unsigned getNumCompileUnits() {
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parseCompileUnits();
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return CUs.size();
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}
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/// Get the number of compile units in this context.
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unsigned getNumTypeUnits() {
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parseTypeUnits();
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return TUs.size();
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}
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/// Get the number of compile units in the DWO context.
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unsigned getNumDWOCompileUnits() {
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parseDWOCompileUnits();
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return DWOCUs.size();
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}
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/// Get the number of compile units in the DWO context.
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unsigned getNumDWOTypeUnits() {
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parseDWOTypeUnits();
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return DWOTUs.size();
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}
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/// Get the compile unit at the specified index for this compile unit.
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DWARFCompileUnit *getCompileUnitAtIndex(unsigned index) {
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parseCompileUnits();
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return CUs[index].get();
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}
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/// Get the compile unit at the specified index for the DWO compile units.
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DWARFCompileUnit *getDWOCompileUnitAtIndex(unsigned index) {
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parseDWOCompileUnits();
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return DWOCUs[index].get();
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}
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/// Get a pointer to the parsed DebugAbbrev object.
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const DWARFDebugAbbrev *getDebugAbbrev();
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/// Get a pointer to the parsed DebugLoc object.
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const DWARFDebugLoc *getDebugLoc();
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/// Get a pointer to the parsed dwo abbreviations object.
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const DWARFDebugAbbrev *getDebugAbbrevDWO();
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/// Get a pointer to the parsed DebugLoc object.
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const DWARFDebugLocDWO *getDebugLocDWO();
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/// Get a pointer to the parsed DebugAranges object.
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const DWARFDebugAranges *getDebugAranges();
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/// Get a pointer to the parsed frame information object.
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const DWARFDebugFrame *getDebugFrame();
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/// Get a pointer to a parsed line table corresponding to a compile unit.
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const DWARFDebugLine::LineTable *getLineTableForUnit(DWARFUnit *cu);
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DILineInfo getLineInfoForAddress(uint64_t Address,
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DILineInfoSpecifier Specifier = DILineInfoSpecifier()) override;
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DILineInfoTable getLineInfoForAddressRange(uint64_t Address, uint64_t Size,
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DILineInfoSpecifier Specifier = DILineInfoSpecifier()) override;
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DIInliningInfo getInliningInfoForAddress(uint64_t Address,
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DILineInfoSpecifier Specifier = DILineInfoSpecifier()) override;
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virtual bool isLittleEndian() const = 0;
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virtual uint8_t getAddressSize() const = 0;
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virtual const Section &getInfoSection() = 0;
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typedef MapVector<object::SectionRef, Section,
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std::map<object::SectionRef, unsigned> > TypeSectionMap;
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virtual const TypeSectionMap &getTypesSections() = 0;
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virtual StringRef getAbbrevSection() = 0;
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virtual const Section &getLocSection() = 0;
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virtual const Section &getLocDWOSection() = 0;
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virtual StringRef getARangeSection() = 0;
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virtual StringRef getDebugFrameSection() = 0;
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virtual const Section &getLineSection() = 0;
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virtual const Section &getLineDWOSection() = 0;
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virtual StringRef getStringSection() = 0;
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virtual StringRef getRangeSection() = 0;
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virtual StringRef getPubNamesSection() = 0;
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virtual StringRef getPubTypesSection() = 0;
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virtual StringRef getGnuPubNamesSection() = 0;
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virtual StringRef getGnuPubTypesSection() = 0;
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// Sections for DWARF5 split dwarf proposal.
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virtual const Section &getInfoDWOSection() = 0;
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virtual const TypeSectionMap &getTypesDWOSections() = 0;
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virtual StringRef getAbbrevDWOSection() = 0;
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virtual StringRef getStringDWOSection() = 0;
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virtual StringRef getStringOffsetDWOSection() = 0;
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virtual StringRef getRangeDWOSection() = 0;
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virtual StringRef getAddrSection() = 0;
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static bool isSupportedVersion(unsigned version) {
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return version == 2 || version == 3 || version == 4;
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}
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private:
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/// Return the compile unit that includes an offset (relative to .debug_info).
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DWARFCompileUnit *getCompileUnitForOffset(uint32_t Offset);
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/// Return the compile unit which contains instruction with provided
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/// address.
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DWARFCompileUnit *getCompileUnitForAddress(uint64_t Address);
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};
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/// DWARFContextInMemory is the simplest possible implementation of a
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/// DWARFContext. It assumes all content is available in memory and stores
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/// pointers to it.
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class DWARFContextInMemory : public DWARFContext {
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virtual void anchor();
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bool IsLittleEndian;
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uint8_t AddressSize;
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Section InfoSection;
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TypeSectionMap TypesSections;
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StringRef AbbrevSection;
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Section LocSection;
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Section LocDWOSection;
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StringRef ARangeSection;
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StringRef DebugFrameSection;
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Section LineSection;
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Section LineDWOSection;
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StringRef StringSection;
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StringRef RangeSection;
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StringRef PubNamesSection;
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StringRef PubTypesSection;
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StringRef GnuPubNamesSection;
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StringRef GnuPubTypesSection;
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// Sections for DWARF5 split dwarf proposal.
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Section InfoDWOSection;
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TypeSectionMap TypesDWOSections;
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StringRef AbbrevDWOSection;
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StringRef StringDWOSection;
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StringRef StringOffsetDWOSection;
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StringRef RangeDWOSection;
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StringRef AddrSection;
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SmallVector<SmallString<32>, 4> UncompressedSections;
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public:
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DWARFContextInMemory(object::ObjectFile &);
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bool isLittleEndian() const override { return IsLittleEndian; }
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uint8_t getAddressSize() const override { return AddressSize; }
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const Section &getInfoSection() override { return InfoSection; }
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const TypeSectionMap &getTypesSections() override { return TypesSections; }
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StringRef getAbbrevSection() override { return AbbrevSection; }
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const Section &getLocSection() override { return LocSection; }
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const Section &getLocDWOSection() override { return LocDWOSection; }
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StringRef getARangeSection() override { return ARangeSection; }
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StringRef getDebugFrameSection() override { return DebugFrameSection; }
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const Section &getLineSection() override { return LineSection; }
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const Section &getLineDWOSection() override { return LineDWOSection; }
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StringRef getStringSection() override { return StringSection; }
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StringRef getRangeSection() override { return RangeSection; }
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StringRef getPubNamesSection() override { return PubNamesSection; }
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StringRef getPubTypesSection() override { return PubTypesSection; }
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StringRef getGnuPubNamesSection() override { return GnuPubNamesSection; }
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StringRef getGnuPubTypesSection() override { return GnuPubTypesSection; }
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// Sections for DWARF5 split dwarf proposal.
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const Section &getInfoDWOSection() override { return InfoDWOSection; }
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const TypeSectionMap &getTypesDWOSections() override {
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return TypesDWOSections;
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}
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StringRef getAbbrevDWOSection() override { return AbbrevDWOSection; }
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StringRef getStringDWOSection() override { return StringDWOSection; }
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StringRef getStringOffsetDWOSection() override {
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return StringOffsetDWOSection;
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}
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StringRef getRangeDWOSection() override { return RangeDWOSection; }
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StringRef getAddrSection() override {
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return AddrSection;
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}
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};
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}
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#endif
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