llvm/lib/DebugInfo/DWARFContext.h
David Blaikie b206103abc Simplify compression API by decompressing into a SmallVector rather than a MemoryBuffer
This avoids an extra copy during decompression and avoids the use of
MemoryBuffer which is a weirdly esoteric device that includes unrelated
concepts like "file name" (its rather generic name is a bit misleading).

Similar refactoring of zlib::compress coming up.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205676 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-05 21:26:44 +00:00

286 lines
9.7 KiB
C++

//===-- 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_DEBUGINFO_DWARFCONTEXT_H
#define LLVM_DEBUGINFO_DWARFCONTEXT_H
#include "DWARFCompileUnit.h"
#include "DWARFDebugAranges.h"
#include "DWARFDebugFrame.h"
#include "DWARFDebugLine.h"
#include "DWARFDebugLoc.h"
#include "DWARFDebugRangeList.h"
#include "DWARFTypeUnit.h"
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/DebugInfo/DIContext.h"
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 {
typedef SmallVector<std::unique_ptr<DWARFCompileUnit>, 1> CUVector;
typedef SmallVector<std::unique_ptr<DWARFTypeUnit>, 1> TUVector;
CUVector CUs;
TUVector 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;
CUVector DWOCUs;
TUVector 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:
struct Section {
StringRef Data;
RelocAddrMap Relocs;
};
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 iterator_range<CUVector::iterator> cu_iterator_range;
typedef iterator_range<TUVector::iterator> tu_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_iterator_range type_units() {
parseTypeUnits();
return tu_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_iterator_range dwo_type_units() {
parseDWOTypeUnits();
return tu_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 *
getLineTableForCompileUnit(DWARFCompileUnit *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 Section &getInfoSection() = 0;
typedef MapVector<object::SectionRef, Section,
std::map<object::SectionRef, unsigned> > TypeSectionMap;
virtual const TypeSectionMap &getTypesSections() = 0;
virtual StringRef getAbbrevSection() = 0;
virtual const Section &getLocSection() = 0;
virtual const Section &getLocDWOSection() = 0;
virtual StringRef getARangeSection() = 0;
virtual StringRef getDebugFrameSection() = 0;
virtual const Section &getLineSection() = 0;
virtual const Section &getLineDWOSection() = 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 Section &getInfoDWOSection() = 0;
virtual const TypeSectionMap &getTypesDWOSections() = 0;
virtual StringRef getAbbrevDWOSection() = 0;
virtual StringRef getStringDWOSection() = 0;
virtual StringRef getStringOffsetDWOSection() = 0;
virtual StringRef getRangeDWOSection() = 0;
virtual StringRef getAddrSection() = 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;
Section InfoSection;
TypeSectionMap TypesSections;
StringRef AbbrevSection;
Section LocSection;
Section LocDWOSection;
StringRef ARangeSection;
StringRef DebugFrameSection;
Section LineSection;
Section LineDWOSection;
StringRef StringSection;
StringRef RangeSection;
StringRef PubNamesSection;
StringRef PubTypesSection;
StringRef GnuPubNamesSection;
StringRef GnuPubTypesSection;
// Sections for DWARF5 split dwarf proposal.
Section InfoDWOSection;
TypeSectionMap TypesDWOSections;
StringRef AbbrevDWOSection;
StringRef StringDWOSection;
StringRef StringOffsetDWOSection;
StringRef RangeDWOSection;
StringRef AddrSection;
SmallVector<SmallString<32>, 4> UncompressedSections;
public:
DWARFContextInMemory(object::ObjectFile *);
bool isLittleEndian() const override { return IsLittleEndian; }
uint8_t getAddressSize() const override { return AddressSize; }
const Section &getInfoSection() override { return InfoSection; }
const TypeSectionMap &getTypesSections() override { return TypesSections; }
StringRef getAbbrevSection() override { return AbbrevSection; }
const Section &getLocSection() override { return LocSection; }
const Section &getLocDWOSection() override { return LocDWOSection; }
StringRef getARangeSection() override { return ARangeSection; }
StringRef getDebugFrameSection() override { return DebugFrameSection; }
const Section &getLineSection() override { return LineSection; }
const Section &getLineDWOSection() override { return LineDWOSection; }
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; }
// Sections for DWARF5 split dwarf proposal.
const Section &getInfoDWOSection() override { return InfoDWOSection; }
const TypeSectionMap &getTypesDWOSections() override {
return TypesDWOSections;
}
StringRef getAbbrevDWOSection() override { return AbbrevDWOSection; }
StringRef getStringDWOSection() override { return StringDWOSection; }
StringRef getStringOffsetDWOSection() override {
return StringOffsetDWOSection;
}
StringRef getRangeDWOSection() override { return RangeDWOSection; }
StringRef getAddrSection() override {
return AddrSection;
}
};
}
#endif