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//===- DWARFDebugLoc.h ------------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#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/DIContext.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<uint8_t, 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.
uint64_t Offset;
/// All the locations in which the variable is stored.
SmallVector<Entry, 2> Entries;
/// Dump this list on OS.
void dump(raw_ostream &OS, uint64_t BaseAddress, bool IsLittleEndian,
unsigned AddressSize, const MCRegisterInfo *MRI, DWARFUnit *U,
DIDumpOptions DumpOpts,
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, DIDumpOptions DumpOpts,
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;
Expected<LocationList>
parseOneLocationList(const DWARFDataExtractor &Data, uint64_t *Offset);
};
class DWARFDebugLoclists {
public:
struct Entry {
uint8_t Kind;
uint64_t Offset;
uint64_t Value0;
uint64_t Value1;
SmallVector<uint8_t, 4> Loc;
void dump(raw_ostream &OS, uint64_t &BaseAddr, bool IsLittleEndian,
unsigned AddressSize, const MCRegisterInfo *MRI, DWARFUnit *U,
DIDumpOptions DumpOpts, unsigned Indent, size_t MaxEncodingStringLength) const;
};
struct LocationList {
uint64_t Offset;
SmallVector<Entry, 2> Entries;
void dump(raw_ostream &OS, uint64_t BaseAddr, bool IsLittleEndian,
unsigned AddressSize, const MCRegisterInfo *RegInfo,
DWARFUnit *U, DIDumpOptions DumpOpts, unsigned Indent) const;
};
private:
using LocationLists = SmallVector<LocationList, 4>;
LocationLists Locations;
unsigned AddressSize;
bool IsLittleEndian;
public:
void parse(DataExtractor data, uint64_t Offset, uint64_t EndOffset, uint16_t Version);
void dump(raw_ostream &OS, uint64_t BaseAddr, const MCRegisterInfo *RegInfo,
DIDumpOptions DumpOpts, Optional<uint64_t> Offset) const;
/// Return the location list at the given offset or nullptr.
LocationList const *getLocationListAtOffset(uint64_t Offset) const;
static Expected<LocationList> parseOneLocationList(const DataExtractor &Data,
uint64_t *Offset,
unsigned Version);
};
} // end namespace llvm
#endif // LLVM_DEBUGINFO_DWARF_DWARFDEBUGLOC_H
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