+//===-- DWARFContext.h ------------------------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===/
+
+#ifndef LLVM_LIB_DEBUGINFO_DWARFCONTEXT_H
+#define LLVM_LIB_DEBUGINFO_DWARFCONTEXT_H
+
+#include "llvm/ADT/MapVector.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/DebugInfo/DWARFCompileUnit.h"
+#include "llvm/DebugInfo/DWARFDebugAranges.h"
+#include "llvm/DebugInfo/DWARFDebugFrame.h"
+#include "llvm/DebugInfo/DWARFDebugLine.h"
+#include "llvm/DebugInfo/DWARFDebugLoc.h"
+#include "llvm/DebugInfo/DWARFDebugRangeList.h"
+#include "llvm/DebugInfo/DWARFSection.h"
+#include "llvm/DebugInfo/DWARFTypeUnit.h"
+#include "llvm/DebugInfo/DIContext.h"
+#include <vector>
+
+namespace llvm {
+
+/// DWARFContext
+/// This data structure is the top level entity that deals with dwarf debug
+/// information parsing. The actual data is supplied through pure virtual
+/// methods that a concrete implementation provides.
+class DWARFContext : public DIContext {
+
+ DWARFUnitSection<DWARFCompileUnit> CUs;
+ std::vector<DWARFUnitSection<DWARFTypeUnit>> TUs;
+ std::unique_ptr<DWARFDebugAbbrev> Abbrev;
+ std::unique_ptr<DWARFDebugLoc> Loc;
+ std::unique_ptr<DWARFDebugAranges> Aranges;
+ std::unique_ptr<DWARFDebugLine> Line;
+ std::unique_ptr<DWARFDebugFrame> DebugFrame;
+
+ DWARFUnitSection<DWARFCompileUnit> DWOCUs;
+ std::vector<DWARFUnitSection<DWARFTypeUnit>> DWOTUs;
+ std::unique_ptr<DWARFDebugAbbrev> AbbrevDWO;
+ std::unique_ptr<DWARFDebugLocDWO> LocDWO;
+
+ DWARFContext(DWARFContext &) LLVM_DELETED_FUNCTION;
+ DWARFContext &operator=(DWARFContext &) LLVM_DELETED_FUNCTION;
+
+ /// Read compile units from the debug_info section (if necessary)
+ /// and store them in CUs.
+ void parseCompileUnits();
+
+ /// Read type units from the debug_types sections (if necessary)
+ /// and store them in TUs.
+ void parseTypeUnits();
+
+ /// Read compile units from the debug_info.dwo section (if necessary)
+ /// and store them in DWOCUs.
+ void parseDWOCompileUnits();
+
+ /// Read type units from the debug_types.dwo section (if necessary)
+ /// and store them in DWOTUs.
+ void parseDWOTypeUnits();
+
+public:
+ DWARFContext() : DIContext(CK_DWARF) {}
+
+ static bool classof(const DIContext *DICtx) {
+ return DICtx->getKind() == CK_DWARF;
+ }
+
+ void dump(raw_ostream &OS, DIDumpType DumpType = DIDT_All) override;
+
+ typedef DWARFUnitSection<DWARFCompileUnit>::iterator_range cu_iterator_range;
+ typedef DWARFUnitSection<DWARFTypeUnit>::iterator_range tu_iterator_range;
+ typedef iterator_range<std::vector<DWARFUnitSection<DWARFTypeUnit>>::iterator> tu_section_iterator_range;
+
+ /// Get compile units in this context.
+ cu_iterator_range compile_units() {
+ parseCompileUnits();
+ return cu_iterator_range(CUs.begin(), CUs.end());
+ }
+
+ /// Get type units in this context.
+ tu_section_iterator_range type_unit_sections() {
+ parseTypeUnits();
+ return tu_section_iterator_range(TUs.begin(), TUs.end());
+ }
+
+ /// Get compile units in the DWO context.
+ cu_iterator_range dwo_compile_units() {
+ parseDWOCompileUnits();
+ return cu_iterator_range(DWOCUs.begin(), DWOCUs.end());
+ }
+
+ /// Get type units in the DWO context.
+ tu_section_iterator_range dwo_type_unit_sections() {
+ parseDWOTypeUnits();
+ return tu_section_iterator_range(DWOTUs.begin(), DWOTUs.end());
+ }
+
+ /// Get the number of compile units in this context.
+ unsigned getNumCompileUnits() {
+ parseCompileUnits();
+ return CUs.size();
+ }
+
+ /// Get the number of compile units in this context.
+ unsigned getNumTypeUnits() {
+ parseTypeUnits();
+ return TUs.size();
+ }
+
+ /// Get the number of compile units in the DWO context.
+ unsigned getNumDWOCompileUnits() {
+ parseDWOCompileUnits();
+ return DWOCUs.size();
+ }
+
+ /// Get the number of compile units in the DWO context.
+ unsigned getNumDWOTypeUnits() {
+ parseDWOTypeUnits();
+ return DWOTUs.size();
+ }
+
+ /// Get the compile unit at the specified index for this compile unit.
+ DWARFCompileUnit *getCompileUnitAtIndex(unsigned index) {
+ parseCompileUnits();
+ return CUs[index].get();
+ }
+
+ /// Get the compile unit at the specified index for the DWO compile units.
+ DWARFCompileUnit *getDWOCompileUnitAtIndex(unsigned index) {
+ parseDWOCompileUnits();
+ return DWOCUs[index].get();
+ }
+
+ /// Get a pointer to the parsed DebugAbbrev object.
+ const DWARFDebugAbbrev *getDebugAbbrev();
+
+ /// Get a pointer to the parsed DebugLoc object.
+ const DWARFDebugLoc *getDebugLoc();
+
+ /// Get a pointer to the parsed dwo abbreviations object.
+ const DWARFDebugAbbrev *getDebugAbbrevDWO();
+
+ /// Get a pointer to the parsed DebugLoc object.
+ const DWARFDebugLocDWO *getDebugLocDWO();
+
+ /// Get a pointer to the parsed DebugAranges object.
+ const DWARFDebugAranges *getDebugAranges();
+
+ /// Get a pointer to the parsed frame information object.
+ const DWARFDebugFrame *getDebugFrame();
+
+ /// Get a pointer to a parsed line table corresponding to a compile unit.
+ const DWARFDebugLine::LineTable *getLineTableForUnit(DWARFUnit *cu);
+
+ DILineInfo getLineInfoForAddress(uint64_t Address,
+ DILineInfoSpecifier Specifier = DILineInfoSpecifier()) override;
+ DILineInfoTable getLineInfoForAddressRange(uint64_t Address, uint64_t Size,
+ DILineInfoSpecifier Specifier = DILineInfoSpecifier()) override;
+ DIInliningInfo getInliningInfoForAddress(uint64_t Address,
+ DILineInfoSpecifier Specifier = DILineInfoSpecifier()) override;
+
+ virtual bool isLittleEndian() const = 0;
+ virtual uint8_t getAddressSize() const = 0;
+ virtual const DWARFSection &getInfoSection() = 0;
+ typedef MapVector<object::SectionRef, DWARFSection,
+ std::map<object::SectionRef, unsigned>> TypeSectionMap;
+ virtual const TypeSectionMap &getTypesSections() = 0;
+ virtual StringRef getAbbrevSection() = 0;
+ virtual const DWARFSection &getLocSection() = 0;
+ virtual StringRef getARangeSection() = 0;
+ virtual StringRef getDebugFrameSection() = 0;
+ virtual const DWARFSection &getLineSection() = 0;
+ virtual StringRef getStringSection() = 0;
+ virtual StringRef getRangeSection() = 0;
+ virtual StringRef getPubNamesSection() = 0;
+ virtual StringRef getPubTypesSection() = 0;
+ virtual StringRef getGnuPubNamesSection() = 0;
+ virtual StringRef getGnuPubTypesSection() = 0;
+
+ // Sections for DWARF5 split dwarf proposal.
+ virtual const DWARFSection &getInfoDWOSection() = 0;
+ virtual const TypeSectionMap &getTypesDWOSections() = 0;
+ virtual StringRef getAbbrevDWOSection() = 0;
+ virtual const DWARFSection &getLineDWOSection() = 0;
+ virtual const DWARFSection &getLocDWOSection() = 0;
+ virtual StringRef getStringDWOSection() = 0;
+ virtual StringRef getStringOffsetDWOSection() = 0;
+ virtual StringRef getRangeDWOSection() = 0;
+ virtual StringRef getAddrSection() = 0;
+ virtual const DWARFSection& getAppleNamesSection() = 0;
+ virtual const DWARFSection& getAppleTypesSection() = 0;
+ virtual const DWARFSection& getAppleNamespacesSection() = 0;
+ virtual const DWARFSection& getAppleObjCSection() = 0;
+
+ static bool isSupportedVersion(unsigned version) {
+ return version == 2 || version == 3 || version == 4;
+ }
+private:
+ /// Return the compile unit that includes an offset (relative to .debug_info).
+ DWARFCompileUnit *getCompileUnitForOffset(uint32_t Offset);
+
+ /// Return the compile unit which contains instruction with provided
+ /// address.
+ DWARFCompileUnit *getCompileUnitForAddress(uint64_t Address);
+};
+
+/// DWARFContextInMemory is the simplest possible implementation of a
+/// DWARFContext. It assumes all content is available in memory and stores
+/// pointers to it.
+class DWARFContextInMemory : public DWARFContext {
+ virtual void anchor();
+ bool IsLittleEndian;
+ uint8_t AddressSize;
+ DWARFSection InfoSection;
+ TypeSectionMap TypesSections;
+ StringRef AbbrevSection;
+ DWARFSection LocSection;
+ StringRef ARangeSection;
+ StringRef DebugFrameSection;
+ DWARFSection LineSection;
+ StringRef StringSection;
+ StringRef RangeSection;
+ StringRef PubNamesSection;
+ StringRef PubTypesSection;
+ StringRef GnuPubNamesSection;
+ StringRef GnuPubTypesSection;
+
+ // Sections for DWARF5 split dwarf proposal.
+ DWARFSection InfoDWOSection;
+ TypeSectionMap TypesDWOSections;
+ StringRef AbbrevDWOSection;
+ DWARFSection LineDWOSection;
+ DWARFSection LocDWOSection;
+ StringRef StringDWOSection;
+ StringRef StringOffsetDWOSection;
+ StringRef RangeDWOSection;
+ StringRef AddrSection;
+ DWARFSection AppleNamesSection;
+ DWARFSection AppleTypesSection;
+ DWARFSection AppleNamespacesSection;
+ DWARFSection AppleObjCSection;
+
+ SmallVector<SmallString<32>, 4> UncompressedSections;
+
+public:
+ DWARFContextInMemory(const object::ObjectFile &Obj);
+ bool isLittleEndian() const override { return IsLittleEndian; }
+ uint8_t getAddressSize() const override { return AddressSize; }
+ const DWARFSection &getInfoSection() override { return InfoSection; }
+ const TypeSectionMap &getTypesSections() override { return TypesSections; }
+ StringRef getAbbrevSection() override { return AbbrevSection; }
+ const DWARFSection &getLocSection() override { return LocSection; }
+ StringRef getARangeSection() override { return ARangeSection; }
+ StringRef getDebugFrameSection() override { return DebugFrameSection; }
+ const DWARFSection &getLineSection() override { return LineSection; }
+ StringRef getStringSection() override { return StringSection; }
+ StringRef getRangeSection() override { return RangeSection; }
+ StringRef getPubNamesSection() override { return PubNamesSection; }
+ StringRef getPubTypesSection() override { return PubTypesSection; }
+ StringRef getGnuPubNamesSection() override { return GnuPubNamesSection; }
+ StringRef getGnuPubTypesSection() override { return GnuPubTypesSection; }
+ const DWARFSection& getAppleNamesSection() override { return AppleNamesSection; }
+ const DWARFSection& getAppleTypesSection() override { return AppleTypesSection; }
+ const DWARFSection& getAppleNamespacesSection() override { return AppleNamespacesSection; }
+ const DWARFSection& getAppleObjCSection() override { return AppleObjCSection; }
+
+ // Sections for DWARF5 split dwarf proposal.
+ const DWARFSection &getInfoDWOSection() override { return InfoDWOSection; }
+ const TypeSectionMap &getTypesDWOSections() override {
+ return TypesDWOSections;
+ }
+ StringRef getAbbrevDWOSection() override { return AbbrevDWOSection; }
+ const DWARFSection &getLineDWOSection() override { return LineDWOSection; }
+ const DWARFSection &getLocDWOSection() override { return LocDWOSection; }
+ StringRef getStringDWOSection() override { return StringDWOSection; }
+ StringRef getStringOffsetDWOSection() override {
+ return StringOffsetDWOSection;
+ }
+ StringRef getRangeDWOSection() override { return RangeDWOSection; }
+ StringRef getAddrSection() override {
+ return AddrSection;
+ }
+};
+
+}
+
+#endif
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