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//===- DWARFDebugLoc.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_DWARF_DWARFDEBUGLOC_H
#define LLVM_DEBUGINFO_DWARF_DWARFDEBUGLOC_H
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/DebugInfo/DWARF/DWARFDataExtractor.h"
#include "llvm/DebugInfo/DWARF/DWARFRelocMap.h"
#include <cstdint>
namespace llvm {
class DWARFUnit;
class MCRegisterInfo;
class raw_ostream;
class DWARFDebugLoc {
public:
/// A single location within a location list.
struct Entry {
/// The beginning address of the instruction range.
uint64_t Begin;
/// The ending address of the instruction range.
uint64_t End;
/// The location of the variable within the specified range.
SmallVector<char, 4> Loc;
};
/// A list of locations that contain one variable.
struct LocationList {
/// The beginning offset where this location list is stored in the debug_loc
/// section.
unsigned Offset;
/// All the locations in which the variable is stored.
SmallVector<Entry, 2> Entries;
/// Dump this list on OS.
void dump(raw_ostream &OS, bool IsLittleEndian, unsigned AddressSize,
const MCRegisterInfo *MRI, uint64_t BaseAddress,
unsigned Indent) const;
};
private:
using LocationLists = SmallVector<LocationList, 4>;
/// A list of all the variables in the debug_loc section, each one describing
/// the locations in which the variable is stored.
LocationLists Locations;
unsigned AddressSize;
bool IsLittleEndian;
public:
/// Print the location lists found within the debug_loc section.
void dump(raw_ostream &OS, const MCRegisterInfo *RegInfo,
Optional<uint64_t> Offset) const;
/// Parse the debug_loc section accessible via the 'data' parameter using the
/// address size also given in 'data' to interpret the address ranges.
void parse(const DWARFDataExtractor &data);
/// Return the location list at the given offset or nullptr.
LocationList const *getLocationListAtOffset(uint64_t Offset) const;
Optional<LocationList> parseOneLocationList(DWARFDataExtractor Data,
uint32_t *Offset);
};
class DWARFDebugLocDWO {
public:
struct Entry {
uint64_t Start;
uint32_t Length;
SmallVector<char, 4> Loc;
};
struct LocationList {
unsigned Offset;
SmallVector<Entry, 2> Entries;
void dump(raw_ostream &OS, bool IsLittleEndian, unsigned AddressSize,
const MCRegisterInfo *RegInfo, unsigned Indent) const;
};
private:
using LocationLists = SmallVector<LocationList, 4>;
LocationLists Locations;
unsigned AddressSize;
bool IsLittleEndian;
public:
void parse(DataExtractor data);
void dump(raw_ostream &OS, const MCRegisterInfo *RegInfo,
Optional<uint64_t> Offset) const;
/// Return the location list at the given offset or nullptr.
LocationList const *getLocationListAtOffset(uint64_t Offset) const;
static Optional<LocationList> parseOneLocationList(DataExtractor Data,
uint32_t *Offset);
};
} // end namespace llvm
#endif // LLVM_DEBUGINFO_DWARF_DWARFDEBUGLOC_H
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