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//===-- 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 "DWARFDebugLine.h"
#include "llvm/DebugInfo/DIContext.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/SmallVector.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 {
bool IsLittleEndian;
SmallVector<DWARFCompileUnit, 1> CUs;
OwningPtr<DWARFDebugAbbrev> Abbrev;
OwningPtr<DWARFDebugAranges> Aranges;
OwningPtr<DWARFDebugLine> Line;
DWARFContext(DWARFContext &); // = delete
DWARFContext &operator=(DWARFContext &); // = delete
/// Read compile units from the debug_info section and store them in CUs.
void parseCompileUnits();
protected:
DWARFContext(bool isLittleEndian) : IsLittleEndian(isLittleEndian) {}
public:
virtual void dump(raw_ostream &OS);
/// Get the number of compile units in this context.
unsigned getNumCompileUnits() {
if (CUs.empty())
parseCompileUnits();
return CUs.size();
}
/// Get the compile unit at the specified index for this compile unit.
DWARFCompileUnit *getCompileUnitAtIndex(unsigned index) {
if (CUs.empty())
parseCompileUnits();
return &CUs[index];
}
/// Return the compile unit that includes an offset (relative to .debug_info).
DWARFCompileUnit *getCompileUnitForOffset(uint32_t offset);
/// Get a pointer to the parsed DebugAbbrev object.
const DWARFDebugAbbrev *getDebugAbbrev();
/// Get a pointer to the parsed DebugAranges object.
const DWARFDebugAranges *getDebugAranges();
/// Get a pointer to a parsed line table corresponding to a compile unit.
const DWARFDebugLine::LineTable *
getLineTableForCompileUnit(DWARFCompileUnit *cu);
virtual DILineInfo getLineInfoForAddress(uint64_t address);
bool isLittleEndian() const { return IsLittleEndian; }
virtual StringRef getInfoSection() = 0;
virtual StringRef getAbbrevSection() = 0;
virtual StringRef getARangeSection() = 0;
virtual StringRef getLineSection() = 0;
virtual StringRef getStringSection() = 0;
static bool isSupportedVersion(unsigned version) {
return version == 2 || version == 3;
}
};
/// 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();
StringRef InfoSection;
StringRef AbbrevSection;
StringRef ARangeSection;
StringRef LineSection;
StringRef StringSection;
public:
DWARFContextInMemory(bool isLittleEndian,
StringRef infoSection,
StringRef abbrevSection,
StringRef aRangeSection,
StringRef lineSection,
StringRef stringSection)
: DWARFContext(isLittleEndian),
InfoSection(infoSection),
AbbrevSection(abbrevSection),
ARangeSection(aRangeSection),
LineSection(lineSection),
StringSection(stringSection)
{}
virtual StringRef getInfoSection() { return InfoSection; }
virtual StringRef getAbbrevSection() { return AbbrevSection; }
virtual StringRef getARangeSection() { return ARangeSection; }
virtual StringRef getLineSection() { return LineSection; }
virtual StringRef getStringSection() { return StringSection; }
};
}
#endif
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