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author | David Blaikie <dblaikie@gmail.com> | 2013-09-23 22:44:40 +0000 |
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committer | David Blaikie <dblaikie@gmail.com> | 2013-09-23 22:44:40 +0000 |
commit | cd7c4980d4ee2d22d92a4907f2d029e67b52d732 (patch) | |
tree | 424cf437838c0b79260958a152a738e5e519fe74 /lib/DebugInfo/DWARFUnit.h | |
parent | f2058addc2aa221d0fd744180a2c04a38ebddcd0 (diff) | |
download | external_llvm-cd7c4980d4ee2d22d92a4907f2d029e67b52d732.zip external_llvm-cd7c4980d4ee2d22d92a4907f2d029e67b52d732.tar.gz external_llvm-cd7c4980d4ee2d22d92a4907f2d029e67b52d732.tar.bz2 |
Exract most of DWARFCompileUnit into a new DWARFUnit to prepare for the coming DWARFTypeUnit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191233 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/DebugInfo/DWARFUnit.h')
-rw-r--r-- | lib/DebugInfo/DWARFUnit.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/lib/DebugInfo/DWARFUnit.h b/lib/DebugInfo/DWARFUnit.h new file mode 100644 index 0000000..4d93de9 --- /dev/null +++ b/lib/DebugInfo/DWARFUnit.h @@ -0,0 +1,175 @@ +//===-- 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_DEBUGINFO_DWARFUNIT_H +#define LLVM_DEBUGINFO_DWARFUNIT_H + +#include "llvm/ADT/OwningPtr.h" +#include "DWARFDebugAbbrev.h" +#include "DWARFDebugInfoEntry.h" +#include "DWARFDebugRangeList.h" +#include "DWARFRelocMap.h" +#include <vector> + +namespace llvm { + +namespace object { +class ObjectFile; +} + +class DWARFDebugAbbrev; +class StringRef; +class raw_ostream; + +class DWARFUnit { + const DWARFDebugAbbrev *Abbrev; + StringRef InfoSection; + StringRef AbbrevSection; + StringRef RangeSection; + uint32_t RangeSectionBase; + StringRef StringSection; + StringRef StringOffsetSection; + StringRef AddrOffsetSection; + uint32_t AddrOffsetSectionBase; + const RelocAddrMap *RelocMap; + bool isLittleEndian; + + 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 { + OwningPtr<object::ObjectFile> DWOFile; + OwningPtr<DWARFContext> DWOContext; + DWARFUnit *DWOU; + public: + DWOHolder(object::ObjectFile *DWOFile); + DWARFUnit *getUnit() const { return DWOU; } + }; + OwningPtr<DWOHolder> DWO; + +protected: + virtual bool extractImpl(DataExtractor debug_info, uint32_t *offset_ptr); + +public: + + DWARFUnit(const DWARFDebugAbbrev *DA, StringRef IS, StringRef AS, + StringRef RS, StringRef SS, StringRef SOS, StringRef AOS, + const RelocAddrMap *M, bool LE); + + virtual ~DWARFUnit(); + + 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, isLittleEndian, AddrSize); + } + DataExtractor getStringExtractor() const { + return DataExtractor(StringSection, false, 0); + } + + const RelocAddrMap *getRelocMap() const { return RelocMap; } + + bool extract(DataExtractor debug_info, uint32_t* offset_ptr); + uint32_t extract(uint32_t offset, DataExtractor debug_info_data, + const DWARFAbbreviationDeclarationSet *abbrevs); + + /// 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); + /// 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; } + /// Size in bytes of the compile unit header. + virtual uint32_t getSize() const { return 11; } + bool containsDIEOffset(uint32_t die_offset) const { + return die_offset >= getFirstDIEOffset() && + die_offset < getNextUnitOffset(); + } + uint32_t getFirstDIEOffset() const { return Offset + getSize(); } + uint32_t getNextUnitOffset() const { return Offset + Length + 4; } + /// Size in bytes of the .debug_info data associated with this compile unit. + size_t getDebugInfoSize() const { return Length + 4 - getSize(); } + 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() ? NULL : &DieArray[0]; + } + + const char *getCompilationDir(); + uint64_t getDWOId(); + + /// 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(); + + void buildAddressRangeTable(DWARFDebugAranges *debug_aranges, + bool clear_dies_if_already_not_parsed, + uint32_t CUOffsetInAranges); + + /// 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); + +private: + /// extractDIEsToVector - Appends all parsed DIEs to a vector. + void extractDIEsToVector(bool AppendCUDie, bool AppendNonCUDIEs, + std::vector<DWARFDebugInfoEntryMinimal> &DIEs) const; + /// 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 |