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97552d7c1c
There will be multiple TypeUnits in an unlinked object that will be extracted from different sections. Now that we have DWARFUnitSection that is supposed to represent an input section, we need a DWARFUnitSection<TypeUnit> per input .debug_types section. Once this is done, the interface is homogenous and we can move the Section parsing code into DWARFUnitSection. This is a respin of r218513 that got reverted because it broke some builders. This new version features an explicit move constructor for the DWARFUnitSection class to workaround compilers unable to generate correct C++11 default constructors. Reviewers: samsonov, dblaikie Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D5482 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218606 91177308-0d34-0410-b5e6-96231b3b80d8
285 lines
9.9 KiB
C++
285 lines
9.9 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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#include <vector>
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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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std::vector<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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std::vector<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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typedef iterator_range<std::vector<DWARFUnitSection<DWARFTypeUnit>>::iterator> tu_section_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_section_iterator_range type_unit_sections() {
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parseTypeUnits();
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return tu_section_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_section_iterator_range dwo_type_unit_sections() {
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parseDWOTypeUnits();
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return tu_section_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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