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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_DEBUGINFO_DWARFUNIT_H
#define LLVM_DEBUGINFO_DWARFUNIT_H
#include "DWARFDebugAbbrev.h"
#include "DWARFDebugInfoEntry.h"
#include "DWARFDebugRangeList.h"
#include "DWARFRelocMap.h"
#include "llvm/ADT/OwningPtr.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);
/// 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; }
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();
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:
/// 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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