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-rw-r--r--lib/DebugInfo/DWARFUnit.h245
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diff --git a/lib/DebugInfo/DWARFUnit.h b/lib/DebugInfo/DWARFUnit.h
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--- a/lib/DebugInfo/DWARFUnit.h
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-//===-- DWARFUnit.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_DWARFUNIT_H
-#define LLVM_LIB_DEBUGINFO_DWARFUNIT_H
-
-#include "DWARFDebugAbbrev.h"
-#include "DWARFDebugInfoEntry.h"
-#include "DWARFDebugRangeList.h"
-#include "DWARFRelocMap.h"
-#include "DWARFSection.h"
-#include <vector>
-
-namespace llvm {
-
-namespace object {
-class ObjectFile;
-}
-
-class DWARFContext;
-class DWARFDebugAbbrev;
-class DWARFUnit;
-class StringRef;
-class raw_ostream;
-
-/// Base class for all DWARFUnitSection classes. This provides the
-/// functionality common to all unit types.
-class DWARFUnitSectionBase {
-public:
- /// Returns the Unit that contains the given section offset in the
- /// same section this Unit originated from.
- virtual DWARFUnit *getUnitForOffset(uint32_t Offset) const = 0;
-
- void parse(DWARFContext &C, const DWARFSection &Section);
- void parseDWO(DWARFContext &C, const DWARFSection &DWOSection);
-
-protected:
- virtual void parseImpl(DWARFContext &Context, const DWARFSection &Section,
- const DWARFDebugAbbrev *DA, StringRef RS, StringRef SS,
- StringRef SOS, StringRef AOS, bool isLittleEndian) = 0;
-
- ~DWARFUnitSectionBase() {}
-};
-
-/// Concrete instance of DWARFUnitSection, specialized for one Unit type.
-template<typename UnitType>
-class DWARFUnitSection final : public SmallVector<std::unique_ptr<UnitType>, 1>,
- public DWARFUnitSectionBase {
-
- struct UnitOffsetComparator {
- bool operator()(uint32_t LHS,
- const std::unique_ptr<UnitType> &RHS) const {
- return LHS < RHS->getNextUnitOffset();
- }
- };
-
- bool Parsed;
-
-public:
- DWARFUnitSection() : Parsed(false) {}
- DWARFUnitSection(DWARFUnitSection &&DUS) :
- SmallVector<std::unique_ptr<UnitType>, 1>(std::move(DUS)), Parsed(DUS.Parsed) {}
-
- typedef llvm::SmallVectorImpl<std::unique_ptr<UnitType>> UnitVector;
- typedef typename UnitVector::iterator iterator;
- typedef llvm::iterator_range<typename UnitVector::iterator> iterator_range;
-
- UnitType *getUnitForOffset(uint32_t Offset) const override {
- auto *CU = std::upper_bound(this->begin(), this->end(), Offset,
- UnitOffsetComparator());
- if (CU != this->end())
- return CU->get();
- return nullptr;
- }
-
-private:
- void parseImpl(DWARFContext &Context, const DWARFSection &Section,
- const DWARFDebugAbbrev *DA, StringRef RS, StringRef SS,
- StringRef SOS, StringRef AOS, bool LE) override {
- if (Parsed)
- return;
- DataExtractor Data(Section.Data, LE, 0);
- uint32_t Offset = 0;
- while (Data.isValidOffset(Offset)) {
- auto U = llvm::make_unique<UnitType>(Context, Section, DA, RS, SS, SOS,
- AOS, LE, *this);
- if (!U->extract(Data, &Offset))
- break;
- this->push_back(std::move(U));
- Offset = this->back()->getNextUnitOffset();
- }
- Parsed = true;
- }
-};
-
-class DWARFUnit {
- DWARFContext &Context;
- // Section containing this DWARFUnit.
- const DWARFSection &InfoSection;
-
- const DWARFDebugAbbrev *Abbrev;
- StringRef RangeSection;
- uint32_t RangeSectionBase;
- StringRef StringSection;
- StringRef StringOffsetSection;
- StringRef AddrOffsetSection;
- uint32_t AddrOffsetSectionBase;
- bool isLittleEndian;
- const DWARFUnitSectionBase &UnitSection;
-
- uint32_t Offset;
- uint32_t Length;
- uint16_t Version;
- const DWARFAbbreviationDeclarationSet *Abbrevs;
- uint8_t AddrSize;
- uint64_t BaseAddr;
- // The compile unit debug information entry items.
- std::vector<DWARFDebugInfoEntryMinimal> DieArray;
-
- class DWOHolder {
- object::OwningBinary<object::ObjectFile> DWOFile;
- std::unique_ptr<DWARFContext> DWOContext;
- DWARFUnit *DWOU;
- public:
- DWOHolder(StringRef DWOPath);
- DWARFUnit *getUnit() const { return DWOU; }
- };
- std::unique_ptr<DWOHolder> DWO;
-
-protected:
- virtual bool extractImpl(DataExtractor debug_info, uint32_t *offset_ptr);
- /// Size in bytes of the unit header.
- virtual uint32_t getHeaderSize() const { return 11; }
-
-public:
- DWARFUnit(DWARFContext &Context, const DWARFSection &Section,
- const DWARFDebugAbbrev *DA, StringRef RS, StringRef SS,
- StringRef SOS, StringRef AOS, bool LE,
- const DWARFUnitSectionBase &UnitSection);
-
- virtual ~DWARFUnit();
-
- DWARFContext& getContext() const { return Context; }
-
- StringRef getStringSection() const { return StringSection; }
- StringRef getStringOffsetSection() const { return StringOffsetSection; }
- void setAddrOffsetSection(StringRef AOS, uint32_t Base) {
- AddrOffsetSection = AOS;
- AddrOffsetSectionBase = Base;
- }
- void setRangesSection(StringRef RS, uint32_t Base) {
- RangeSection = RS;
- RangeSectionBase = Base;
- }
-
- bool getAddrOffsetSectionItem(uint32_t Index, uint64_t &Result) const;
- // FIXME: Result should be uint64_t in DWARF64.
- bool getStringOffsetSectionItem(uint32_t Index, uint32_t &Result) const;
-
- DataExtractor getDebugInfoExtractor() const {
- return DataExtractor(InfoSection.Data, isLittleEndian, AddrSize);
- }
- DataExtractor getStringExtractor() const {
- return DataExtractor(StringSection, false, 0);
- }
-
- const RelocAddrMap *getRelocMap() const { return &InfoSection.Relocs; }
-
- bool extract(DataExtractor debug_info, uint32_t* offset_ptr);
-
- /// extractRangeList - extracts the range list referenced by this compile
- /// unit from .debug_ranges section. Returns true on success.
- /// Requires that compile unit is already extracted.
- bool extractRangeList(uint32_t RangeListOffset,
- DWARFDebugRangeList &RangeList) const;
- void clear();
- uint32_t getOffset() const { return Offset; }
- uint32_t getNextUnitOffset() const { return Offset + Length + 4; }
- uint32_t getLength() const { return Length; }
- uint16_t getVersion() const { return Version; }
- const DWARFAbbreviationDeclarationSet *getAbbreviations() const {
- return Abbrevs;
- }
- uint8_t getAddressByteSize() const { return AddrSize; }
- uint64_t getBaseAddress() const { return BaseAddr; }
-
- void setBaseAddress(uint64_t base_addr) {
- BaseAddr = base_addr;
- }
-
- const DWARFDebugInfoEntryMinimal *
- getCompileUnitDIE(bool extract_cu_die_only = true) {
- extractDIEsIfNeeded(extract_cu_die_only);
- return DieArray.empty() ? nullptr : &DieArray[0];
- }
-
- const char *getCompilationDir();
- uint64_t getDWOId();
-
- void collectAddressRanges(DWARFAddressRangesVector &CURanges);
-
- /// getInlinedChainForAddress - fetches inlined chain for a given address.
- /// Returns empty chain if there is no subprogram containing address. The
- /// chain is valid as long as parsed compile unit DIEs are not cleared.
- DWARFDebugInfoEntryInlinedChain getInlinedChainForAddress(uint64_t Address);
-
- /// getUnitSection - Return the DWARFUnitSection containing this unit.
- const DWARFUnitSectionBase &getUnitSection() const { return UnitSection; }
-
-private:
- /// Size in bytes of the .debug_info data associated with this compile unit.
- size_t getDebugInfoSize() const { return Length + 4 - getHeaderSize(); }
-
- /// extractDIEsIfNeeded - Parses a compile unit and indexes its DIEs if it
- /// hasn't already been done. Returns the number of DIEs parsed at this call.
- size_t extractDIEsIfNeeded(bool CUDieOnly);
- /// extractDIEsToVector - Appends all parsed DIEs to a vector.
- void extractDIEsToVector(bool AppendCUDie, bool AppendNonCUDIEs,
- std::vector<DWARFDebugInfoEntryMinimal> &DIEs) const;
- /// setDIERelations - We read in all of the DIE entries into our flat list
- /// of DIE entries and now we need to go back through all of them and set the
- /// parent, sibling and child pointers for quick DIE navigation.
- void setDIERelations();
- /// clearDIEs - Clear parsed DIEs to keep memory usage low.
- void clearDIEs(bool KeepCUDie);
-
- /// parseDWO - Parses .dwo file for current compile unit. Returns true if
- /// it was actually constructed.
- bool parseDWO();
-
- /// getSubprogramForAddress - Returns subprogram DIE with address range
- /// encompassing the provided address. The pointer is alive as long as parsed
- /// compile unit DIEs are not cleared.
- const DWARFDebugInfoEntryMinimal *getSubprogramForAddress(uint64_t Address);
-};
-
-}
-
-#endif
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