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//===-- DWARFBaseDIE.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 LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFBASEDIE_H
#define LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFBASEDIE_H
#include "lldb/Core/dwarf.h"
#include "lldb/lldb-types.h"
#include "llvm/Support/Error.h"
#include <optional>
namespace lldb_private::plugin {
namespace dwarf {
class DIERef;
class DWARFASTParser;
class DWARFAttributes;
class DWARFUnit;
class DWARFDebugInfoEntry;
class DWARFDeclContext;
class SymbolFileDWARF;
class DWARFBaseDIE {
public:
DWARFBaseDIE() = default;
DWARFBaseDIE(DWARFUnit *cu, DWARFDebugInfoEntry *die)
: m_cu(cu), m_die(die) {}
DWARFBaseDIE(const DWARFUnit *cu, DWARFDebugInfoEntry *die)
: m_cu(const_cast<DWARFUnit *>(cu)), m_die(die) {}
DWARFBaseDIE(DWARFUnit *cu, const DWARFDebugInfoEntry *die)
: m_cu(cu), m_die(const_cast<DWARFDebugInfoEntry *>(die)) {}
DWARFBaseDIE(const DWARFUnit *cu, const DWARFDebugInfoEntry *die)
: m_cu(const_cast<DWARFUnit *>(cu)),
m_die(const_cast<DWARFDebugInfoEntry *>(die)) {}
// Tests
explicit operator bool() const { return IsValid(); }
bool IsValid() const { return m_cu && m_die; }
bool HasChildren() const;
bool Supports_DW_AT_APPLE_objc_complete_type() const;
// Accessors
SymbolFileDWARF *GetDWARF() const;
DWARFUnit *GetCU() const { return m_cu; }
DWARFDebugInfoEntry *GetDIE() const { return m_die; }
std::optional<DIERef> GetDIERef() const;
void Set(DWARFUnit *cu, DWARFDebugInfoEntry *die) {
if (cu && die) {
m_cu = cu;
m_die = die;
} else {
Clear();
}
}
void Clear() {
m_cu = nullptr;
m_die = nullptr;
}
// Get the data that contains the attribute values for this DIE. Support
// for .debug_types means that any DIE can have its data either in the
// .debug_info or the .debug_types section; this method will return the
// correct section data.
//
// Clients must validate that this object is valid before calling this.
const DWARFDataExtractor &GetData() const;
// Accessing information about a DIE
dw_tag_t Tag() const;
const char *GetTagAsCString() const;
dw_offset_t GetOffset() const;
// Get the LLDB user ID for this DIE. This is often just the DIE offset,
// but it might have a SymbolFileDWARF::GetID() in the high 32 bits if
// we are doing Darwin DWARF in .o file, or DWARF stand alone debug
// info.
lldb::user_id_t GetID() const;
const char *GetName() const;
lldb::ModuleSP GetModule() const;
// Getting attribute values from the DIE.
//
// GetAttributeValueAsXXX() functions should only be used if you are
// looking for one or two attributes on a DIE. If you are trying to
// parse all attributes, use GetAttributes (...) instead
const char *GetAttributeValueAsString(const dw_attr_t attr,
const char *fail_value) const;
uint64_t GetAttributeValueAsUnsigned(const dw_attr_t attr,
uint64_t fail_value) const;
std::optional<uint64_t>
GetAttributeValueAsOptionalUnsigned(const dw_attr_t attr) const;
uint64_t GetAttributeValueAsAddress(const dw_attr_t attr,
uint64_t fail_value) const;
enum class Recurse : bool { no, yes };
DWARFAttributes GetAttributes(Recurse recurse = Recurse::yes) const;
protected:
DWARFUnit *m_cu = nullptr;
DWARFDebugInfoEntry *m_die = nullptr;
};
bool operator==(const DWARFBaseDIE &lhs, const DWARFBaseDIE &rhs);
bool operator!=(const DWARFBaseDIE &lhs, const DWARFBaseDIE &rhs);
} // namespace dwarf
} // namespace lldb_private::plugin
#endif // LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFBASEDIE_H
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